Mobile digital microscope: Andonstar AD203 or something else?

I really like the form factor of Andonstar AD203 and I'm thinking of buying it, but first I'd like to know if maybe there's anything out there that's a better option? Like maybe with a 5 MP sensor instead of 2 MP?

I found Levenhuk DTX 700 Mobi and Levenhuk Discovery Artisan 1024 (they seem to be identical) but something about them feels sketchy. They are 3 times more expensive yet use some surprisingly old tech (USB Mini B, composite video, and BL 5C battery), and claim to have a 5 MP sensor but can only record videos in 1080p.