I have been using the Dakine Nitrous shorts for years. I am on my second pair and I am happy with them. They seem to last well over 200 sessions before the webbing wears out which is about three years for me.. (this is the same life as any harness for me). They are a bit less bulky than the Ion shorts (which some of my friends use and they are also happy with).
The Dakine Nitrous has a handle (covered rope) on the back but strangely the Ion model has nothing.
I recently switched to a rope spreader bar (the Ion model) and it works well on the Dakine shorts.