I bought this with my new Prophet REV 2. For an expensive synthesizer like the Prophet I needed something to transport it in with minimum protection or to protect it against the rain. This keyboard bag does the job, you will have to be careful though. It will not protect your synth/keyboard from hitting it against a hard of rough surface. If handled carefully, a perfect cheap solution. I will probably buy a proper case later on, this works for now.
Pro's:
-Cheap
-A separate space for cables/adapters/pedals/...
-Straps to keep your keyboard in place
-Easy to carry around
Cons:
-Relatively cheap material
-Don't recommend it for expensive instruments/gear
-Your gear is not REALLY protected