I wanted to buy this as a dustcover and decided to buy the original one to make sure it really fits. A non-fitting dustcover can be a pain in the ... when you're gigging and have to play Tetris with your equipment in the truck. I thought it to be a bit overpriced. But this is a really protective cover. Fits like a glove, water-repellent and it is padded, so it will protect the amp from impacts and scratchy surfaces. Is is not a flightcase, of course but is quite comparable to a really high-quality gigbag for guitars (think of a TOKAI or PRS gigbag)
Given this, the price is ok!