I bought this at the same time as my Korala plastic concert ukulele, but since I never take that anywhere, I'm now using it to keep the dust off a small MIDI keyboard (a Yamaha CBX K1, which is 509 x 155 x 55 mm (20-1/16? x 6-1/8? x 2-3/16?).
I've had zipped bags and soft cases where the zips were hard to operate, and I expected them to break, sooner or later. The zips on this work well, so I'm confident that they'll last.
It's a good weight - not too heavy or too flimsy, and there's a decent amount of padding.
The price is good too - and it's an even better price for a small keyboard bag.