Lots of people did, then many of them cancelled the preorders over what Paul Andrews did with the youtube copyright strikes with Octav1us. Also, he was one of the guys behind the Vega and Vega+.. so he's
obviously trustworthy...
Not really seen many reviews of it around. Software seems pretty much the same as the C64 mini but with a replica of the keyboard running over a usb connection.
I think I'd rather have a Pi64
https://www.thegeekpub.com/13651/raspberry-pi-commodore-64/
That said, the new version of the 'not a competition pro' joystick with microswitches looks interesting, and not horrendously expensive either. I've got one of the official competition pro USB sticks, and it's not great. So this may be better.