I didn't prefer it on my viper but I like it on my Cobra. I use my viper when I really want comfort and the hazmore doesn't beat the summit seat for that. It does have some advantages though, how high you're able to sit in comparison to the bar if your bowhunting out of a viper for example
When I am looking for comfort I use the summit seat on top of the net seat so I can still be sitting up high and have a comfy butt rest.
Currently have this setup on an Ol' Man stand I've been using, but last year I did the same with my summit.