it’s 4 months old and I think it’s still interesting to see what people think about the gel seat.
I love it !!!
It’s very comfortable. Seems to similar to KH Gel and Koxx Gel. Koxx has different stitching only and maybe the Koxx is a bit more comfortable but that could be a subjective impression cause mine are in different use so they maybe different in becoming softer. Stitching on KH Gel and UDC is maybe more clever than on the Koxx one but only from thinking about, I never feel the stitching on the Koxx 
I never test both on a long ride, only over maybe a half hour or one hour of riding in one peace.