It is a cheap way of playing dittys and perhaps recording a basic midi but as others have said it is a toy. There are plenty midi keyboards or controllers out there....second hand they are not much more expensive. I would save till I could buy a decent one. Here is a link to some proper midi keyboards
http://www.gear4music.com/Keyboards--Modules/MIDI_Keyboards.html?gclid=CIHhl_y0_ZgCFRMFZgodi3vRmA

and here is a link to some proper keyboards
http://www.musiciansbuy.com/keyboards_pro_keyboards_sound_modules_roland.html

http://www.soundclick.com/bands/songInfo.cfm?bandID=687727&songID=5238055