We love our busy baby mat - so much so that I went back and bought 2 extra tethers so we can use all 4 corners!
With dogs in the house, it does seem to get clogged up pretty quickly and not stick, but a quick wipe on each suction cup typically solves the issue.
My 7 month old can play with his toys, throw them all off the tray, and grab them again on his own! Keeps things off the dirty floor and keeps me from endlessly bending over to retrieve them. Love it!!