I've been using this for a couple of years now. Initially bought to house a MIDI keyboard, but since that stays at home most of the time - I've begun to use it for my vocal effects (TC Helicon VoiceLive 3) and accessories, cables, etc. I will also carry some mobile recording equipment in there on occasion.
I don't have much experience with similar bags, but this one was inexpensive and works really well - sturdy, simple, practical. The long shoulder strap can be detached and then you can comfortably carry the bag in your hand, like a suitcase.
I give this 4/5 just because I'm sure there are excellent products in a similar price range that might turn out to be better - but my experience so far has actually been 5/5. Recommend it!