We've used Top Hat for several years for annual chimney cleaning. Greg has always been our sweep. He was very thorough and explained everything that he did, including what he found inside our chimney (mostly spider webs). He would go up on a ladder to inspect the exterior of our chimney. This year, Adam came instead to clean and inspect our chimney. He was very quick and tidy, but didn't comment on the condition of the chimney interior. He was focussed on pointing out a crack on the exterior of my chimney. He said it might or might not get worse through the winter, and it should be repaired. The "crack" turned out to be nothing more than a line of old caulking left when the old flashing was replaced in 2014. If Adam had actually gone up on a ladder or on the roof to inspect the chimney closely, he would have seen there was no crack. In future, I'd prefer to that Greg come to clean/inspect our chimney.