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Hard question - but i think i have to go with the Oscillator. We also have Fibro Therapy, Neck Masseuse and Rainshower
I really like the Bullfrog myself. I am also a service company for them. I will bring up one thing about them that most in here should agree on. The dead water and space behind the jet packs will cause a disgusting situation with slime, dirt, etc if you do not remove them at least every other time you drain and refill water...if not every single time.