The most vocal complaints I've been hearing were about the price.
Strangely enough, I ran into a few friends who'd buy the Joy-Cons (even if they weren't going to buy the Switch), just to see how good they feel.
I then proceeded to move to another topic entirely, because I didn't want to hear why.
I WON A BET AGAINST AZUREN! WOOOOOOOOOOAAAAAAAAHHHHHHHHHHHHHHHHHHH