It's fun!

I live in the Ozarks. It's ungodly hilly here, and I've found the SS conversion is faster than the original 10 speed because I'm not waiting on the cludgy shifting. If I travel, I can throw the bike in the back of my car with the chain on and not worry about it getting hooked on anything. Instead of trying to hit the right gear, it's more about spinning/stomping to carry momentum downhill and getting up the next hill.

As for weight, my other regular ride is a 45+lb. 3 speed so a 23-ish lb. bike boom frame feels like nothing. I'm starting work on a more practical granny-geared bike, but I'll still take my SS out when I want to go for a quick spin. I think most of us have multiple bikes, so it's just another option.