On Island Princess. Went to dinner in dining room for first time this cruise tonight. I had carefully navigated their flawed app & had a reservation for 7:00 PM. Like Seinfeld episode "yes, you have a reservation but no we don't have any tables, come back in 15-20 minutes." This is not our first rodeo. When we got on we had invite to 'most traveled guest' lunch with captain with the papers the room steward had delivered to our cabin. 15 minutes after ordering at the near by bar we hadn't even gotten out drinks . I guess they were out with drinks to deliver looking for people and their medallions. We went back, still no table. We were used to arriving at the dining room and being escorted to our table by a nice waiter. This was always possible with two seatings spaced a few hours apart. The first seating could sit there for a long time & sometimes it takes a long time for a table of eight. The staff hurried to get completely ready for the second seating. Now they have reservations twenty minutes apart. We eventually ended up at a table close to the one they wanted us to wait for. At 8:30 the people were still sitting at "our" 7:00 table. This system is badly broken. Have future Princess cruises reserved but will have to do some serious thinking before getting on another Princess cruise.