You're right about the fur collars I have one that really dresses up the poncho, makes it more elegant. They are really are very versatile, I love wearing mine when I go out for a meal as I don't have to worry about cloakrooms etc, it just folds up next to/behind me
They're also great on shopping trips, as you can fold them up and pop it into a bag if you get too warm in a store

Cost per wear my poncho is probably my best H buy ever and seeing as I have had it for about 4 years now, I think I maybe due another in a colour (mine is neutral grey/tan)