The Stanwell in my avatar is an estate pipe. Made in Denmark. It is more than a step or two above my two Doc Grabows. When it arrived, there was still dottle in the chamber and though the stem is acrylic, it had a nasty Latakia smell. I'm just thankful the original owner was a fan of Latakia and not aros.
Anyway, following the various Youtube videos on cleaning and sanitizing the pipe, it end up extremely clean. Appears the original owner smoked the pipe perhaps once or twice - absolutely no cake build-up, just dottle. The aroma was removed quickly and efficiently.
It smokes wonderfully now, and has taken on the aroma of my Virginia flake. If it has a flaw (and it's not really a flaw) - it's that the bowl is huge. It took approximately two and a half hours to smoke my way from top to bottom. For the rest of the day my brain was in a stupor. I'm taking a week off from smoking after that experience.