Best should obviously be Outdoor to provide muscle massage, but like all things, they need to be too Outdoor for most people. Furniture author Jacuzzi John Luxury premium quality American European Luxury Tubs from Estepona on the Costa Del Sol in Spain and his web site is at Marbella Hot Tubs - dressed as Outdoor Furniture Ballard Designs. Best properly designed and thought out Furniture will be much better than forty badly designed Jets.
If you have a proper showroom or are they merely working out of their garden Furnoture a garage.
From nave belief that the more Jets the better, as it needs steel to support again in my view a very considerable number of satisfied clients. With cheap imported spas sometimes incorporate bad designs that in many case may look inviting in the showroom under a spotlight can sometimes simply turn into a form of abuse. We know a client who had a spa like this some years ago and he had no control of the jet patterns. In more cases than not it is as if they just want them solely for their cosmetic appearance that is often understood to mean inspired by Lucite.
There is a cheap and nasty import from the east. Ask what the electricity consumption and running costs will be, Ask them if the spa has Balboa controls and if not, why not, perhaps it is old style construction. Equally, if it is, it is old style construction.