Summary: Easy install. Great for the price. Bought this for my girlfriend and installed it in her car for her. She loves it much more than the stock crap she had. Only reason I reduced a star was because there were a couple dead cells on the face so a couple things don't display perfectly. She doesn't mind & wasn't worth the pain of removing the whole thing and returning.
Summary: More options to play music than you can shake a stick at. Listening to the radio itself is interesting though... FM is unstable and attempting to listen to something on the AM side is impossible.
Summary: Works a treat, easier to install than I expected. SD slot is beneath the faceplate but that's not a major drawback. Lots of power, good sound, loudness button is a nice feature. Controls are fairly intuitive. Others have noted that it is difficult to see the display during the day; I have not found that to be a problem. Tiny drawback: the "Random" feature doesn't "stick" between sessions. For the price, an amazing deal.
Summary: Just so you know, the USB does not read iOS and also does not charge. It reads FAT & FAT32, which most USB sticks are formatted to by default, so they work fine. The SD card slot is great, though it'd be nice if you could move around the file system. The readout sucks for sunlight. Overall good for the price.
Summary: This is an ok head unit. As so many others have said, YOU CAN NEVER SEE THIS IN SUNLIGHT. Even at night it's still a bit hard to read. The forward button is kind of broken after 6 months (it no longer clicks, but still functions). I'm dreading the thought of having to remove the console to replace the headunit again. Just buy a better headunit and save your time.