While most of this stuff pack is very nice and there's a lot of nice variety in the patterns they offered for the furniture, I have to say the central item, the hot tub is very lackluster.
Unlike previous games, the hot tub does not help with fun. All it will do is slowly increase hygiene. In order to remove negative moodlets, you have to upgrade it to the oils, to get any fun you need to toss a TV up nearby for the sims to watch (I don't have sim yet capable of putting in the radio on the tub, I assume that upgrade will hopefully add fun?)
So far, my sims don't seem to like being in the hot tub very much, even if I'm trying to destress them using the oils. They will promptly try and get out and pick another activity. The pool is a much better recovery item, it will boost fun very fast, add a +2 happy moodlet and removes tense moods. I was hoping the hot tub would be better for elder sims because a pool counts as exercise and can exhaust them, but right now, it's better to send them to the bathroom to have a bath.
Experimentation continues... hopefully once the radio goes in the hot tub will be more attractive to the sims, as it is the hot tub is a very expensive and slightly soggy couch.