The joy-cons look just like the ones that came with the system itself, just different colors. I always update the controllers when an update is available. The controllers frequently disconnects then tries to reconnect, when in use (fully charged most of the time). This happens roughly every 5 minutes and makes it difficult to play a game that requires precise timing. Occasionally the joy-cons won't register that direction or command that I press, so this also makes gameplay a bit difficult.
Controller looks great but has been sub-par since initial purchase. Updates don't seem to fix the problem at all. Would exchange them if possible, but these are not worth the price we paid, considering they were supposed to be an Official Nintendo product.