I did buy a Kirsten full bent about 30 years ago. My complaint was that the bowl was small. The smoke was over way to fast. But I have slowed my pace down a lot now. I can make a bowl last 45 to 60 minutes now. I now own 3 Kirsten and one Viking Dr. Graybow "metal" pipe.
The Viking is similar to the Falcon and I think that they would smoke the same. Both the Viking and the Kirsten pipe bowls are small. Kirsten has some larger bowls and there are independent carvers that will make large bowls. I do have an independent made bowl to test. It is huge. I will report when I test it.
Lastly, The bowls have a tapered chamber which further reduces the amount of tobacc. And, I think that the center draft hole would promote a uniform burn whereas the side draft hole causes a lopsided burn toward the shank leaving dottle on the side opposite the shank. I do find less dottle in the metal pipes.
The falcon, I guess, and viking are very easy to clean. But, cleaning the Kirsten is no problem. BTW the falcon bit does not come out of the shank. The Viking bit does.
What is it about these pipes? They give a dry smoke similar to a meer or a cob. They clean up fast and are ready to go again for rapid turn around. The extra bowls take up little room making them great for travel.
YMMV. It takes all kinds.
:puffpipe: