I have one picture quality is ok not as good as some of the Marcum cameras. The wifi part seems to work good not real sure on distance that it works from. Usually use it in wheel house. I bought it more for the kids to get them interested in the fish more than anything.
I actually had a guy give me one he moved down south and it was just sitting around. I downloaded the app to my phone and messed around with it in the house seems pretty slick.