Two questions.
1) Have you ever actually owned a Porsche before, or say even a car before?
2) Have you ever visited an auto web forum before?
I don't mean to be trite but your message above smacks of a lack of experience. First you come into an auto forum and go to the complaints section and are surprised to find complaints? Ummm that's why the section exists. So people can talk about and hopefully share solutions for any complaints they might have.
Is any car perfect? NO.
Have you read the JD Power quality surveys for 2006 and 2007 model cars? Do you know what car is the number 1 sports car in terms of quality? THE CAYMAN S!
So, if you go visit any other car forum you are going to find lots of complaints about every other car on the road, and if you read JD Power you will find those other cars have a lot more wrong with them than the Cayman.
You might also want to consider the law of averages. THere are over 10,000 Caymans on the road worldwide, of which about 750 or so are registered here, probably a few hundred that aren't, so let's say this site represents 1 in 10 Cayman owners. Then in the complaints section there are complaints from what 5 or 10 people in a topic out of the 5500 plus members we have here, what percentage is that? It would seem to me that if you took anything anyone said here and extrapolated it to apply to all 10,000 Caymans on the road that you'd be making a huge statistical calculation error, but hey I'm not a stats major so what do I know?
Last, but not least, your final paragraph implies that you think Porsche hasn't had it together at some point in time. While this may have been true in 1990-1992 when they almost went under, Porsche is now the most profitable auto manufacturer and they didn't get that way by NOT selling cars or having a bunch of faulty cars on the road. In fact just the opposite is true, all models rank highly in terms of quality, and Porsche has a very high % of cars still on the road vs. those made.
Finally, I do agree that if you don't think the Cayman is for you then you should buy something else, just keep in mind that whatever else you do buy won't be on average as good of quality and won't be the best handling sports car you can buy either, and probably won't have a cool forum like this one either.
I guess I am at a loss to explain how someone buys or doesn't buy a car based on something they read on the internet vs. test driving one for themselves...