The only good things I have to say about the joycons are that they enable you to play a few 2 player games with only the base set (tablet + 2 joycons), and that I made some money shellswapping/repairing parts for people who didn't feel confident in messing with the very delicate ribbon cables.
Other than that, they are uncomfortable, fragile, and prone to all sorts of failures. Thw inclusion of HD rumble was a waste of money, as well as the unused infrared sensor.