I have had a bad Peterson, but I also have a dozen and a half that are good-to-excellent smokers. Even if Peterson pipes didn't offer unique features, like the p-lip or the System pipe, I am drawn to Peterson due to their timeless shapes, which is the very same thing that draws me to Dunhill.
+1 but for me the P Lip and System are the key historical appeal. And I have had a bad one as well but I don't find the need to disparage the whole brand. I reserve that for bloodsucking tobacco profiteers.