I was needing a MIDI keyboard to use it with my computer, but just to launch samples or playing little parts, so I was searching something really small, and also cheap because I didn't want to spend lot of money on a midi keyboard.
The only thing I find a little bit troublesome is the fact that on this keyboard there are little thin keys, so if you want to play basic and simple notes, that's ok. But if you want to play something more complex you should consider a keyboard with standard keys.
However I found it useful because with thin keys I have more octaves, having more triggers, and I can also shift through octaves because on the rear there are two buttons. But I find that these buttons aren't fast to reach when you are playing.
To use it with Logic to compose, it's simply great.