I bought the Lego Upside Down Stranger Things Set 75810 on Temu! Here's My Review

Copyright infringement issues aside, I was REALLY impressed with the quality of this set! Get it if you're able to find it. It seems to go in and out of stock regularly. I will probably go this route again in the future for other retired sets or some of the other ridiculously high priced sets.

The Good:

The pieces were all there (save for a couple random ones that didn't effect the build)
The instructions were great, even if they were small and hard to read on a few steps
The colors and quality were great on the bricks
They all fit together well. Some were REALLY tight, but I'd rather that than they be loose
All of the mini figures and accessories are there and look great!

The Bad:

Copyright infringement (if that bothers you)
The stickers are darker in color than the real ones, but otherwise spot-on.
The bicycle is junk. Both the tires and the handlebars being the wrong direction
No light up brick (which led to Temu giving me a full refund)

Overall I would definitely recommend this set. It may not be the best if you want to actually play with it and rebuild it, and I wouldn't mix these pieces in with my real Lego, but this is 99% perfect if you're just going to build it and display it as I will be doing.