Bought in November of 2011 and have been using the Goodyear i4000 Tire Inflator for 5 months now once a week on my parent's car. I'm maintaining their Lexus ES300 which developed a slow leak, which according to a local tire shop is caused by chrome flaking from the wheel resulting in an imperfect seal between tire and wheel. The pump has worked as expected (I had reservations after reading bad reviews here). It takes about 3-4 minutes to pump the deflated tire from ~15PSI to ~35PSI.
All functionality on mine works, including the light. The power cord is plenty long for my parent's 4 door sedan and I've tried it on my GF's Ford Expedition SUV and the tire pump reaches all 4 tires just fine as well (I just tested the length of the cord, I did NOT actually inflate the SUV tire).
Overall, I'm happy with the purchase: $8.97 with free super saver shipping.
I'll be purchasing a couple more if and when the price falls back to my previous purchase price.