I had the trailing arms replaced at dealer expense before I purchased my 2007 cayman. After doing all the research I could I have found nothing that kept me from purchasing after that was done. There is also a ride enhancement kit you can do but from the folks I talked to it was a mixed bag of responses. Everyone almost stated that replacing the stock shocks with Bilsteins shocks made a huge difference without the ping tanks and slightly larger air lines. I went the shock route only.
I am sure you will get a lot of mixed answers on this question. I am very pleased with my Monaco. By the way, my replacement trailing arms were the beefer ones not the same flawed design.
