The plusses are weight/size ratio, good wind profile from all directions, stove capable, simple pitch with one pole. I like the absence of guylines too.
The cons would be loss of useful space around the edges. More stakes than other designs, but then that helps in wind and snowload departments.
We sold our traditional nylon 4-season tents and went to tipis last year. No regrets. For our use and typical conditions the tipis rock.
We've had a few in a short time, and they all have their purposes. We've had Seek Outside in 2, 4, 6, and 12 person sizes.
After using those, we sold the smaller tipis, keeping just the 6 for backpacking, an the 12 for around the vehicle.
The 6 is a lot of space for the weight. 7'10" peak. About 5 lbs with carbon fiber pole. At 6'3", I can easily walk in without stooping.
In comparison, the Trango-2 we sold was 9+ lbs, for a crawl-in 2 person. Of course the Trango is superior for hardcore mountaineering, but we don't do that.
