its been a year or so on mine and i only seldom hear anything. there was an immediate difference between what was on there and the poly. and i still tighten at ride height because why not.

 

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.

 

i had the old design with 0 problems for 2 years with quite a few autox outings and had the new style for 3 months with no problems.

i am biased toward the hardrace kit per personal experiences. only used one poly product for longer than a month and it squeaked or rather creeeeaaakkkked when i hit the normal bumps and i had enough. the silence rubber delivers is far greater for my daily and hold up great for all my cone battling