JoyCon drift ruined my ability to play in handheld mode so I went out this week looking for an alternative like a hori left joycon or a split pad pro.
After mentioning all the stuff I could use it instead of a joycon to the staff at game one of them remembered they had this behind the counter.
It seems to be alright. I wanted it for playing in bed but it's not really made for that as the tablet hangs off the controller and weights the whole thing down, you need to be lying down in a specific way to really use it. It's up to the task if you're sitting down though. I'd much rather use it over a working joycon.