I just purchased this air compressor today and have used it on all of my family's bicycles (4 adult and 2 childrens'). I think this is a great product. It is relatively fast (one adult mountain bike tire inflated from ~10psi to 65psi in about 90 seconds), and I like the features. The best features are:
1. adjustable pressure goal (you set the dial to the desired pressure and a sensor turns the compressor off when pressure is reached);
2. high top-end pressure of 250psi - great for road bikes;
3. this compressor offers what most do NOT - both the ability to inflate in a high-pressure, low-volume environment (like tires) and it alos offers a high-volume output to blow up items like kiddie pools, inflatable toys, air mattresses, etc. The max pressure of the high-output side is 6psi, which is sufficient. The compressor comes with a length of tubing which connects the high-volume output to the application.
4. The footprint of the compressor is just right - it includes a sizeable "glovebox" to store all the accessories, and you don't have to wind up the 12V power cord as perfectly as it was when you unwrapped it for the very first time - there's enough extra space to just stuff it all back in and forget it.
The best thing about this unit: the price. I got mine for a mere $7.50 today at Target. Perhaps this was a mistake, but I'm glad I made the purchase. I like it very much.