They’re cool, but as others have pointed out the roms that are pre installed are generally junk. They’ll pack thousands of NES roms because they’re small, and maybe a handful of PlayStation games. The SD cards provided will also be junk tier and need to be replaced because they will fail.

The r36s is a great entry point, it’s cheap but has a large community so there’s lots of guides to make flashing a new OS and even curated rom packs. It’s far from perfect, but for $50ish all in and two hours of tinkering it gets the job done.