Those "NEW " bathroom in two day TV ad's

I havent seen the ads, but it seems if you need new plumbing ie moving the mixer or raising the shower head, god forbid you have old galvy. You look at that stuff the wrong way and you are plumbing the whole house. moving electrical outlets? removing old tile? I think some are somehow taking measurements then making a fibreglass surround to place over the shower stall/tub. Once they glue that stuff in place I suppose two guys could R&R fixtures......2 days is a pretty short turnaround.

Can you post a link?