Synth and stage piano in one.
I've owned two of these and I sold them. Here's why I bought them and here's why I sold them:
I bought them because I wanted an awesome piano sound in my bedroom. I started a conservatory drum study and it also involved learning piano. I started songwriting and I thought it would be great to learn piano and be able to write songs on piano and have this monster as my master keyboard in my studio.
It's definitely a fantastic product. The sound is amazing and the build is like a tank. Try and break this? You'll need to go to the gym first, because lifting it up is the first problem.
So the piano sound is fantastic. You can get the half-damping pedal to go with it and that feels great. The keys are very nice, but not very realistic. Still, the best I've come by yet.
Sound is great for on stage, but not really for in the studio. Could have something to do with my mixing skills, but I must say that if you play it quite hard, it just doesn't sound very nice. The attack gets very aggressive.
I bought it because I liked the 'piano and synth all in one package'. It's quite cool, but the only thing that REALLY sounds good is the piano. You won't want to use this synth in your studio. Your software synths are probably way better. It's digital anyway and it's quite hard to edit the sounds.
I sold my latest one and have bought a real analog synth. It's so fantastic compared to the digital ES 90. Besides sounding beautiful, the real synths are built for editing the sounds, so there's enough knobs to fiddle with, instead of a complicated screen menu.
Best piano sound I've heard on a stage piano. Great as a master keyboard for its keyboard and it's stability. For most things you would not want to record it; rather go for a real piano. Difficult interface for editing sounds.
If you play live and you're quite strong or if you study piano and need to practice and have no space for a real one, then it's fantastic; buy it. If you aren't then just buy a cheap midi keyboard and use sample libraries.