We are in the process of picking a new pool liner and I am having more anxiety over it than I did getting married. Anyways I am looking at Plastimayd liners and they have a few options for 20/27 mil, 27 mil, and ultra-mayd (supposed to last 50% longer). Is it really worth spending the money for the thicker liner or is it just a way for pool companies to make a little more money.