For those of us with small-ish hands - this writer raises a small-ish hand without shame - the Joy-Con controllers are fairly comfortable when slotted into the Nintendo Switch. For those with bigger paws, though, it can be a bit of a cramp to use the right stick comfortably. That's to be expected with various Nintendo controllers and portables, but it can still be unfortunate for those that develop a claw while playing the system.
The Ben Heck Show has done a rather fun mod to get around it, which certainly isn't pretty but is functional. There's the show's trademark 'regrettable acting' at the start, but we found this to be a rather amusing and interesting watch; it turns out the way the joystick works in the Joy-Con is a bit weird.
A fun experiment, even if most of us manage with the current setup or buy a Pro Controller.