Can't Beat ISM
I used to love ISM. And then I hated ISM. I used to have to zip-tie the rails to make it narrow. And then I found the PN 1.1. No more zip-ties. No more love/hate relationship with ISM. While I only have 300 KM (trainer K's) on this saddle to date, I have had no issues whatsoever with this saddle. It's comfortable upright and in aero. It's narrow enough that you can ride it further back if you are in need of a little rest. It has, IMO, the perfect amount of padding for either bike shorts or tri shorts. Can't wait until winter is over so I can test it on the road because, if you have ridden ISM, you may hate it on the trainer but it can be the perfect saddle on the road.
Pros: narrow profile