Just booked 3 rooms on C and P for the end of May. I'm coming into town for 1 night with some friends to go see the Cirque Du Soleil show that will be there at that time. Got a great airfare, going to take the ICE train from FRA into Cologne and cash and points rooms worked out......^
Will report back after. I'm hoping for a nice upgrade but won't be disappointed if I get a standard room.