Perfect fit for the M-Audio Keystation Pro 88, leaving approximately 3" length space to place one of the right-angled, velcro'd book-ends provided, so the keyboard can't move at all.
Provided are 8 pieces of velcro-backed padding/dividers: 2 x book-end dividers (very solid, felt covered); 4 x fabric covered foam pads - 2 thick, 2 thin; 2 x grey, conical-pyramid foam pads. So I've also used it to transport the Roland D-50 (5 octave) and peripherals. The main handle is so comfy, I think I may have to Gator-up more gear and sell off some semi-flight cases!
ALTHOUGH mine isn't as advertised on the Thomann site or the Gator site. Mine has round, black rubber handles on either end, NOT the same red handle as on the side, as advertised. I had to travel with it the day after it arrived; no time to query it...
Surprisingly light for it's size, seems lighter than semi and full aluminium flightcases.
Aside from the issue of the handles, I have to say that every gig has been a breeze and this seems to be a great case. Everything about it seems solid and reliable.