I use Porter for my flights between Toronto and Washington DC. I was a bit apprehensive about flying on a turbo prop but I can tolerate it for sake of the convenience. From my office I can be at Island airport in under 30 mins--the shuttle is very handy when there is little traffic. The underground walkway is still under construction...if they could link it to the PATH that would be great. Porter lounge is a nice experience as others have mentioned. They are not equipped for NEXUS users which is unfortunate but custom lines are not usually long. FA's are ok, wasn't impressed with the on board snacks which were the same snacks served in the lounge--cookies. Beer and wine was a nice touch but was only served one glass. Kiosk at Dulles is easy to find and not busy.