I did it for the first time this year and loved it. The pace was a bit slow and it took me and my friends over 4.5 hours to do the whole thing, including rest stop, & other stops (they were cruising). My behind hurt like hell afterwords since most of my previous rides are less than two hours and even the padded shorts didn't help much.

Ended up sleeping the morning off at Navy Pier waiting to be picked up.