Spiderman,
A Bullfrog tub has a 2 1/2 inch water line running around the top of the tub. Each jet pack has a pair of unions and a 1 inch air line that allows you to move them or order the tub with what ever jetpack you want. The water filtration is the same as other tubs that have a filter bay. Bullfrog tubs are full foam insulated.
Yes, I agree with you Bullfrog talks alot about the jet pack idea and very little about the rest of the tub. The componants are the same high quality you find in other manufacturers, Balboa controls, Dell ozone generators, Emerson Motors, Aquaflo Pumps and Waterway Jets for the most part.
The big hype with the jet packs is alittle overblown cause you probably wouldn't move them around constantly but once you find your favorite seat you can move your favourite jetpack to that seat. We have thought about buying one other jet pack ( found one alittle boring ) but haven't yet
Bullfrog tubs have a excellent warranty, 3 years "blame free" on the equipment, 5 years on the skirt, 7 years on the shell and a lifetime against leaks
All in all they make a great tub at a good price