Caveat: We live in Florida! So, this was a seasonal investment and can only speak to the first season at this time. 
We love it, my husband and I. We are at the end of August and cannot wait until it starts to cool down in the evenings. The heat is great, on point. The bubbles are as strong as one might expect with an affordable spa. They get the job done and are strong enough to help with those lower back knots and spasms. We both spend far too much time in front of the computer for work and sitting all day kills the lower back (even with a standing desk and getting up to move). I am tall and can fully submerge diagonally across the tub. This is awesome, as we don't have a pool and there is something about floating in water that is very relaxing to me. 
I will write more after the 2017-2018 "winter" season. :D