Here's some improv stuff done on the ultra cheap Gear4Music 61 key digital 'piano'. Keys are non-weighted, and the sustain pedal wasn't there...very hard to play properly. I'm using the 'electric piano 1' sound.

The instrument is actually not all that great (the 'acoustic piano' sounds are godawful), and I would not recommend it to beginners, nor to players who want something super portable for travel or practice. However, toys are to be played with, so there you go. was had