A couple things I don't like would be is that there is only one EG and it can only be applied as a mix to the filter or amplitude. There is no reverb effect. The looper is cool but hard to use, it would have been better to just have more sliders for other parameters. Even then, everything about this keyboard is great. Highly portable, feels good, built in speakers are decent, keys feel great and I find no issue playing them. I love the ease of programming, and you can make a large variety of sounds.