I have a Metropolis, Citizen and now a Yalta (backpack style) I loved the Metropolis, hated the Citizen, but wanted to try a backpack so got the Yalta. Now I hate the Citizen even more, the Metropolis is alright, and the Yalta is great. My back sweats using all three so that is a non factor. The Metropolis used to be amazing for me, but after using the Yalta, the Metropolis is annoying. I rode with it last night. It is bigger interior wise than the Yalta, yet holds so much less due to the shape.
My longest ride with any of them has been 59 miles with the Metropolis. It was fine at the time but I think I would be really annoyed with it now.