As for qaulity and performance , I had to replace 4 rooms of carpeting about 9 years ago due to a "leak free" oil bath compressor so I switched to these oiless types and have found them to be flawless and I've never looked back. Obviously you wouldn't run a large framing crew with it , then you'd have a gas powered compressor. It still uses a 3450 rpm motor to get the air output/low 14 amp draw . Other machines sometimes have 1750 rpm motors which are quieter but pump less air.

Be advised about this shipping problem with this compressor.
Damaged Compressor due to defective design - My compressor arrived damaged due to the gauge assembly being bent during shipping resulting in the nipple to the tank splitting open. The compressor was unusable. After thinking about it for 30 seconds, I realized that this compressor can not stand up to any damage on the job and moreover may represent a situation where the gauge could unexpectedly blow out and kill/injure someone.
good unit for the price - So far it has been trouble free. although i do take my large compressor i find the unit that usually comes out of the truck is this one.BUT IT'S A COMPRESSOR. if you have a need for a lightweight fairly high SCFM unit, this might fit the bill.
A good compressor to get you started. - I shopped extensively for a light duty compressor based on the following criteria: price, weight, and flow rating. It features the same motor and compressor as the PC 3HP twin stack model but is $40 cheaper and about 10 pounds lighter. It is an oil free design, so it can operate on uneven ground.

Other than that what can I say - it pumps air. It is fairly loud, but I haven't listened to many other models to make an educated comparison. I have used it quite a bit for high air flow operations, such as blowing off dust / debris and even running an air chisel to bust up concrete. It often runs full time for 5-10 minutes and is able to keep up with air demand. If you are going to be regularly moving the compressor around, spend the extra. I actually ran a compressed air line out to my garage, so the compressor can stay put in the basement and avoid potential damage from moving it.

*** 4-year update ***

I have owned this compressor for 4+ years now and am still completely satisfied. I used a hand held, air chisel to break up the mortar joints. The compressor was operating at 100% duty cycle for 10-15 minutes at a stretch, but couldn't quite keep up with continuous use of the air chisel. As an last ditch experiment, I bought a 10 gal portable air storage tank, some extra quick disconnect fittings and rigged up a reserve tank in parallel with the 4 gallon PC tank. (yes, I am an engineer) My thinking was that I would run the crap out of my little PC and if it bit the dust, that was my excuse to buy a new compressor. I am amazed to say the PC compressor ran flawlessly for the entire chimney demo and still works fine today.

Looking at the other brands of portable compressors I really like how well this one is built.
Don't know yet - I spoke with the owner of the company, Kim Allen, and he said that I would need to have it repaired under the warranty. After several calls to the toll-free number in the manual to the factory, I was put in touch with a repair facility an hour away and was told they don't stock the part but could order it and get it back to me in a few days. I contacted Porter Cable customer service and was told there is no reason why Kimco should not replace the unit - in fact, the very helpful customer service rep even explained that Porter Cable would pick up the return shipping costs. Hopefully, PC will come though without me spending four round trip hours and a week without a compressor.
Darn Good Little Compressor - Short and sweet - this compressor delivers on its promises - it is easy to use, easy to break-in, easy to maintain, and you can't beat the duel air hose inlets. I have found both of the built in pressure gauges to be accurate, and the oil-free motor is quieter than other compressors I have used (although it still makes a good bit of noise). To me, that's portable - I can understand how that would not be the case with everyone, but my experience leads me to believe that this compressor has a very good weight-to-horsepower-to-air storage capacity ratio.
Heavy Duty versatility - First off I am a homeowner, not a contractor and have been using this compressor in my house to do renovation trim work for over two years.
It is a fantastic compressor for my purposes. I run one in to my garage for airing my tires, and one in the shop for projects.
When I move the compressor in to a room I am renovating, the two outlets also let me have two tools going at the same time, i.
I will tell you it is LOUD but so are all compressors in this class, and this one is not as loud as my last old Campbell-Hausfeld. So if you are planning on moving your compressor around a lot, this is the WRONG compressor for you.
But if you want a relatively stationary compressor with greater than ordinary capabilities, you may agree this is the ticket.
It has run glitch free and recharge time is fast.
Plenty of Power to Offer...but it needs plenty, too. - I tried the compressor on an
undedicated 15 amp circuit, and it immediately blew the switch every
time.
I also learned (the hard way, of course) that if you are using the
compressor with a 50' extension chord (with too high a guage) on a 20
amp circuit, the pump will not get enough electricity to pump air
after cutting-in when the tank pressure drops to 110 psi (the
specified cut-in pressure) - the pump will start pumping, but quickly
stop and you'll hear the motor straining until it blows the 20 amp
circuit, too. It's
cheaper, my new Porter Cable friends say, to buy more air hose than
the right gauge extention chord - Ah, such knowledge I'm gaining.
Sadly, the compressor arrived with an air intake filter housing badly
bent downward (done apparently at the factory, as the box from Amazon
wasn't damaged), so I couldn't remove the air filter. AND, the drain
valve (to drain water from the bottom of the tank) would not
completely close allowing lots of air to excape from the tank. In my
chats with an Amazon tool sales rep, and later with a Porter Cable
tech rep (to help me unravel the compressor's electrical-needs
mysteries), both Companies quickly and nicely insisted on sending me a
new air intake filter housing and a new drain valve (I guess I'm
getting two of each?) - no questions asked. The machine is fairly
loud, but it only takes my pump about 6 seconds to refill the tanks
from the 110 psi cut-in pressure to the specified 135 psi cut-out
pressure. I figure the noise level goes hand-in-hand with the added
power this compressor offers - power I think I need. Suggestions: the
manufacturer needs to tighten quality controls inspection of the
product prior to boxing & shipping, and the editorial reviewers
need to "call a spade a spade" in write-ups on this tool's
power needs.

" It will be delivered to your address but not UNLOADED, unpacked, or assembled. So, they offer "free shipping", not "free delivery.