I ran across this study, “New report offers analysis on the Inflatable Hot Tub Market” which presents data on the “historical, current and future outlook of the market”.
Some of the spas included in the study can be found on Amazon. I’m sure the study is a lot more extensive than my looking at Amazon feedback – it better be for the price of it – but I don’t see many that I would be confident in to buy. For example: I’d stay away from any of them that 10% or more of the reviews are 1 (one out of five).
These two are the ones that I found with the best feedback…