I began using Noble Otter's Lonestar soap recently. It whips up a rich, creamy, slick lather, producing great shaves using Noble Otter's synthetic brush. My blue lathering bowl shows a recent shave's lathering results.
Pros: It lathers well even in the house of horrors (plumbing issues).
Cons: None
As a shave it's great, but as a daily shaver, it has a problem on my skin. After a couple days, my face develops a rash around the lips.
It never happened with shave in a can, and it didn't happen with Jack Black Beard Lube, but it does happen with Supreme Creme.