I haven't tried it out, haven't even seen it really as the household I am playing now don't have one and not planning to in the future but I am happy. The Perfect Patio Stuff pack is one of the most used stuff packs and I love hottubs and getting a new one, especially one with a roof is only a plus for me.
Edit: Forgot to add; that it being part of the basegame doesn't retract for me at all. In fact, I say, about time, as at least one hottub should have been part of the basegame from the beginning :smiley: