I wouldn't get a case for the sake of protection but I'm more than happy with my Dbrand Kill Switch case due to its added usability. The kickstand is a must for me when placing a powered on Steam Deck on soft items such as pillows not to block the air vents. Being able to put the cover on and leave Steam Deck standing upright saves unreal amount of space on my desk compared to how it was before. If you'd rather go with something slimmer, there is also Deckmate.