I've had poly for 2 years and no squeeks and i beat my car up.

btw...i have skunk2's and they have been everything i've needed. I havent had any problems except for one time the alignment slipped but i think the bolts werent tight enough. Its been a good year and half and it hasnt slipped since. I used to beat it up at autocross frequently and it has held up rather well and i have the old style camber kit. I can imagine that the new design is much better.