They are one piece, just like they set up very easily, just like the Viper. They are extremely comfortable, just like the Viper.

Having said that, I know some guys that do not like them because:
1. They are heavier than the Viper.
2. Contrary to what Summit says, they are not a stand up sit down climber, they are a hand climber. While it is feasible to climb with it as a stand up/sit down type, it is difficult and very slow.

I have the Viper with the footrest, and I have never taken it off since I initially installed it.

For me though, the Revolution is better than the Viper, and I love mine. For others, they did not like it and have gone back to the Viper.