If you don't use the screen protectors that come in the package, I would say $40 for the case by itself is definitely steep. Taking into account that the screen protectors cost $15 when purchased separately, the case is essentially $25. If you do end up using the included screen protectors, I would say without a doubt it's worth it at this price point. It's definitely a few steps above most other toy cases being sold in the market. The noot case, being a hidden gem sold at a highly competitive price, is the exception. Though i'd say the Air Jacket is still of noticeably higher quality and with it's rigid shell, I feel it offers better drop protection than the noot. I can't think of any other cases that fit certain criteria while coming close to the quality and aesthetics of the Air Jacket.
So bottom line? Power Support should sell the case separately from the screen protectors. I think they're hurting themselves by not doing so.