So, it was OK. Attendance was a little disappointing (~60 out of a class of more than 300). That included mostly people I was casual acquaintances with in high school and not people I was good friends with. Everybody was pretty much mellow and friendly. Honestly physically people had aged pretty much how I expected--the high school linemen were fat but the other football players weren't. The girls that were thin were still thin. Some people looked almost exactly like they did back then. Other people had changed pretty completely. Glad I went, don't feel any compelling reason to go back to any more.