Most second-time hot tub buyers go for a simpler hot tub the next time around because they found out that all they really ended up using was the jets.  

Salespeople love to upsell people on extras and upgrades because it means more profit.  I personally tend to be a minimalist, and I’m reluctant to promote needless features that don’t significantly contribute to the hot tub experience and/or offer practical benefits.  But don’t let that stop you from going hog wild if you feel like it because after all, it’s your money!