Exactly what I was looking for! I often got cramps while playing on my switch in handheld mode for extended periods of time and this has totally solved that. At first I was unsure on the all red design but I came to love it and looks great on my switch with the grey joy cons. I was also surprised to find out it fits the official 'Nintendo Switch Accessory Set - Carry Case + Screen Protector' be it very snug and only in one orientation but it fits!
Cons: Only negatives I can say about this is that it won't fit on the dock with this case on so removing it is necessary to dock & it can make slight noises as you move your hands around the case as the fit isn't 100% snug although I don't think it would be very easy to put on/off if that was the case