I have a Mobile Pixels one, it’s certainly been a big help. Power and picture from the same USB-C cable. It was kind of hard to install (have to adhesive on some magnets correctly, glue wasn’t too great, I recently replaced them with some other adhesives I bought online, worked good so far).
For the most part it doesn’t give me any issues, does what I want of it, but if I have one complaint it’s that when I’m playing a game that uses my laptop’s graphics card, I will usually have to unplug and replug the screen back in because it begins fizzling out like it’s losing power or signal. Functions fine after though. It’s slightly annoying but not that big a deal.
Overall I don’t regret my purchase, I just wish it was a bit more polished with an easier and more reliable mounting process and not fizzling out when I play intense games.