I have been fixing spas for three decades, of the ones on the list, Sundance, then Hot Springs. Viking and Lazy-Boy are junk. Cheap doesn't happen because "everyone else is trying to rip you off", and looks mean nothing.
Reread it, look more closely at the punctuation. The recommendation is for Sundance, then Hot Springs. (<--- see the period?). Viking and Lazy-Boy are then called "junk"
My Bad....whew!