I have had three Costellos over the years, but have traded them all off. While I did enjoy the tactile feeling of the Sea Rock finish, I do not care for acrylic stems, they smoke wet for me and hurt my teeth Since I smoke mostly Virginia and VA/PER I never got a satisfying smoke from my Costellos. They seem to smoke very dry and removed the flavor from the smoke.
I smoke mostly English pipes, primarily Comoy and GBD, but have nearly probably 10 Chacom and nearly as many Danish pipes, several of which are Stanwell.
I can definitely understand why some people like Castillos, but for me they did not smoke as flavorfully as my other pipes.
Life's too short to smoke a pipe you don't enjoy, so those of you who love Costellos, smoke in great enjoyment!