I have spent 2 weeks with the Sloth and I am very impressed. It is a great smoker. I have enjoyed loading it up with English and it is perfectly drilled.
I have to try hard to find the differences between the Sloth and my custom Layton's. The only difference with the pre-made stem is the airway through the stem is not as wide open as Clark's custom made pipes. The airway is more traditional like a Dunhill stem. I love how with Clark's custom stems you need the fluffy pipe cleaners . The bit is shaped well and it is very comfortable ( you can see in the pics that he reshapes them)