I've had dBrand's Killswitch case (both the 1st OG iteration and the fixed version) for the Steam Deck for a while. It was solid, very good quality, but its high price (depending on if you get all of the accessories or not) makes it very difficult to recommend. As for the JSAUX mod case, I love the different options they offer. The most expensive option is more expensive than dBrand's Killswitch travel kit (if you get all the accessories) but JSAUX's most expensive mod case kit has more accessories that are much more useful like the fact that it can come with a battery bank, a cooling fan, a USB-C hub, etc. The kit I got was the cooler fan mod kit. It comes with a strap, the case, Steam Dock cover, travel cover, a 90 degree USB-C accessory, detachable metal stand, and a cooler fan with an adhesive attachment that lets you put the fan on a Steam Deck without the case. Costs 50 dollars US before taxes which is less than dBrand's most basic Killswitch essential kit that costs 60 dollars US. JSAUX's design is better than dBrand's. It's much easier to remove JSAUX's travel cover. There is cushioning inside the travel cover that will actually protect the Steam Deck screen better. You don't need a USB-C extender or adapter for the opening on the JSAUX case unlike with dBrand's case. JSAUX's metal stand is less bulky than dBrand's. It is detachable. It doesn't have microSD storage slots inside the stand like dBrand's stand does but if you have a JSAUX Steam Deck carrying case, then it doesn't matter. All JSAUX Steam Deck case mod kits comes with a strap that lets you put a battery bank on the back (no need for adhesive like dBrand's does. dBrand's mechanical mount is 14.95 US btw). I wanted the cooling fan because unfortunately my Steam Deck has the less efficient Delta fan inside. I would change the fan inside for the better Huaying fan but this is my 2nd Steam Deck. I'm afraid to open it up and mess it up again. The JSAUX cooler fan works. It is a bit noisy but if you have the sound volume high or let's say you have a tower fan blowing in your room, you're not really going to be bothered as much by the JSAUX fan. The grips on this case are just as good as the grips on dBrand's Killswitch case. 2 things I don't like about this specific kit is the fan can be a bit loud (as mentioned before) and it is a fingerprint magnet. You can see some of my fingerprints on the travel cover and on the back of the case in a couple of the pictures. Even the cooler fan is a fingerprint magnet so make sure to have a microfiber cloth on hand to wipe when need be. I'm not putting down dBrand. I like dBrand products. I'm still using dBrand's thumb stick grips (I like using them although maybe for a lot of people they are unnecessary) with my Steam Deck. But if you want a cheaper protective case for your Steam Deck that provides more bang for your buck, JSAUX's Steam Deck case kit is way better.Pros: more options, some options are much cheaper than dBrand's, more well thought out design/modular, less bulky, travel cover easier to remove, more bang for your buck, fan does help cool your Steam DeckCons: cooler fan can be a bit loud, the travel cover + cooler fan + back of the case are fingerprint magnetsEDIT: 9/7/2023 (more dBrand info)Before anybody tells me that dBrand has the dock adapter kit now, I see that they do offer that which includes a USB-C extender. Problem is that the adapter kit is an extra $7.95. I'm not a fan of that but at least they offer that now (even though you can get a USB-C extender for cheaper than that). Oh, apparently the adapter to fit your Steam Deck with the KillSwitch case doesn't automatically come with the essential kit. Come on dBrand.