The Studiologic SL88 Studio is a really well thought out keyboard in every aspect. Its design is aesthetically pleasing, the button layout is intuitive and its packed with useful features. I especially like the built in midi merge feature, for when you're playing with more then one keyboard. Quality wise it feels like its built to last, the keys are weighted and has a nice feel to them and the X/Y Joysticks feel like they are going to last for at least 10 years. The only possible downside i can see with this controller is its weight, but if your going for a full size 88 controller its an aspect you'll have to learn to live with regardless of the brand.