I really like these 'ergonomic' JoyCon replacements.
The tiny JoyCons are a pain to hold. These replacements make holding the Switch while you play a lot easier for my carpal tunnel suffering hands.
Everything works like the stock JoyCon, except there is something substantial to hold on to.
Wireless Controller for Switch, BestOff Neon Red Neon Blue Controllers Compatible for Nintendo Switch Console via Amazon Read the rest
These cheap grips make playing Mario Kart against my kid easier.
For less than $12 delivered these have improved my Switch experience. JoyCons firmly pop into these ABS grips, and while the firmness of the buttons takes a game or two to get used to, these fit my hand far better than the stand-alone JoyCon.
The button tops also help my CTS prone hands from tiring as quickly.
I find JoyCons miserably small, these grips help.
AmazonBasics Grip Kit for Nintendo Switch Joy-Con Controllers via Amazon Read the rest