I use this for my Nexus S, but it is compatible with anything that uses a micro USB port. You will be hard-pressed to find a charger that performs equally as well for this price. Here's why I like it:
-It's quick to charge. While my metrics are purely in my head, this seems to charge faster than others I've owned. -The cord length is significant. I've never found myself wishing it were longer. I'd guess it to be about 4-5 ft. -The cord is straight. The ones with a wound cord have always made me feel like I'm battling a very weak monkey for use of my phone. -The retractable cord makes it easy to pack up. And -- probably even more importantly -- keeps the cord from becoming a tangled mess. When not in use, it helps to keep everything squared away.
Honestly, for $3, one should be happy enough with "works." But this is one of the best, quickest car chargers I've ever owned. I'm pleasantly surprised and have been using it for months without any problems.