quality posts: 1
I got one of these when woot had them before and I call it "the best $20 ever spent". It can learn any IR remote you have. You can download remotes other people have made. You can even create macros to turn on several devices, etc. It's really good.
Like others have said, though, if you're planning on using it on your phone that you actually use for phone things a lot and take out in public, you're probably not going to want to leave this thing plugged into it, and you may lose it. Or you might get tired of taking it off and putting it back on.
However, if you've just gotten an iPhone 5 and you still have your old iPhone laying around... this thing makes your old iPhone totally worthwhile. It can be your remote for everything. iTunes, your TV, stereo, Apple TV (if you have one), literally everything. You can just leave this plugged in and between this thing and bluetooth and wifi, you're totally covered. You can use your new iphone 5 outside and to play games or whatever else you might use it for and let it charge while you use your old iPhone for this kind of stuff.
1 Screaming Purple Monkey
2 Bandolier of Carrots
11 Other, Less Fun Woots