I also had a salesperson tell me that the warranties on some of the spas are tricky. For example, if a heater was defective, it could be replaced once and if the same component failed again, it was buyer responsibility. That your water could be tested and your warranty voided because you "abused" your spa by not maintaining the water within certain guidelines. I have read a couple of the warranties and there are no guidelines given there. Which companies have the tricky warranties, so that I can be certain that I gather enough data on them to be sure I can comply.