Yeah they are crazy cheap and yeah seem ligit , that is one ugly foil but pretty well anything works behind a boat. You'll want their biggest front wing 30" and that's still pretty small 1175cm2 ( no good for the wing foiling). Can't comment how it would go on a wing foil or surf but doesn't look promising. If you really want to get into winging or surf you really should look at second hand brand name gear at least that way you know you can get the different wings which bolt straight on in the future that actually proven and work.

Slingshot ,Naish, Neil Pryde can't go wrong ,there are heaps more but they are the major ones reasonably priced and
have wings for everything that are interchangeable.

I'd go NP over Slingshot personally, having owned Slingshot.
Or you could look at Gong.