Pros
-Haven't tested yet
Cons
-They're suing Nintendo over their joy-con controllers in a patent troll fashion, even though they only have 3000 likes on Facebook versus millions of likes and billions of dollars for Nintendo
Final verdict:
-Every single pros the Wikipad attachable controller for phones has is automatically negated by the aforementioned con. Boycott Gamevice and their Wikipad until their lawsuit fails epically. :P
(other than that it could be handy for the RPG Maker emulator)