I did a lot of research before choosing Bullfrog. Boiled down to comparing to the Bullfrog, Hotsprings and Marquis brands. I was lurking in all the hot tub forums I could find and finally picked the Bullfrog A8. It seems that there are many that refuse to accept the new technology that Bullfrog uses and the constant fault they referred to was that the water behind the seats became stagnant. That was addressed and fixed by Bullfrog many years ago but that is still out there. After 6 months with my new tub I have not had a single problem and can attest to the quality workmanship of my tub. If you pay attention to the water chemistry and rinse of the filters which takes about 5 minutes a week the tub basically takes care of itself. Comparing to the swimming pools I have owned in the past my wife and I get far more use from the hot tub. In the winter it was wonderful to relax in the tub in freezing weather and now in the hot Texas summer its great to cool off and have a massage in 90 degree weather. With our previous pools we got around 4 months a year of comfortable use and now with the tub we hop in almost everyday. Its a big hit when family and friends come over and we even found some water proof cards to play in the tub. Add some good music and adult beverages and its party time. Thanks Bullfrog for a quality product and saving me from any buyers remorse.