You are going to get differnt reviews on everything as peoples tastes are not the same.. I have my engine out and of coarse found torn OE motor mounts... I did some searching and decided to try a Noltec set, I read the complaints and the updates posted by Z1 and I concluded they fail due to lack of heat sheilds being reinstalled, I did take Z1's precaution and wrapped them in heat reflecive tape.. I have 0 miles on them yet so I cant say for sure they are holding up but I am confident they will and wont sacrifice anything with these....I would assume the Polyurethane would be a mix between the 2 as there a little stiffer than sock but not as SOLID as a solid mount..just my thoughts..