I will say bullfrog has come a long way since they started, but they are a gimmick tub. The removable jetpacks idea is kind of silly. We found people rarely if ever actually swapped them around in the tub, and they certainly never bought different ones to try out. The jetpacks are expensive, and they had problems with leaks.
I bought out another company that was an existing sundance spas dealer and kept that dealer license and dropped bullfrog. I sell nearly 300 tubs a year now. My best year with bullfrog was less than 50. Sundance and hot springs are the 2 biggest names in the game. Their warranties are top notch, the overall fit and finish is above everything else in the game, as is their new technology (smart tub).
I'm currently 10 months out on new sundance orders and people are still willing to wait. Sold 12 last week alone.