I don't know anything about the Hollis, but I have almost four years on a Fusion. I would NOT recommend the Bullet skin, but I cope with the Tech skin just fine.
Pros: Light, dries fairly quickly (hours in Sport skin, overnight in warm weather for Tech, slow for Bullet). Flexibility (superb in Sport, acceptable in Tech, restricted in Bullet). The dry core is extremely difficult to damage, meaning fewer leaks. It's easy to repair, meaning that leaks, if you get them, won't keep you out of the water much. Seal replacement is reportedly easy using the dry adhesive system; using the SiTech quick seal system, it is trivial -- but if you are small across the shoulders, the neck ring may impede your mobility in reaching your dry suit dump or your tank valves.
I bought one of the first Fusions sold in our area. I now own two. That says something, I think.