We have the ELC one and it's fine. My children don't really play on it that seriously but I bought it for the record and playback function and the way the keys light up so they can play an actual tune. I would recommend it.
Im looking for a keyboard possibly with different sound effects, and a good working microphone, with a little stool. I know ELC do one but I've not been that impressed with the quality of other toys I've had from there before. Any recommendations?