I will certainly complain if there is something wrong with the meal. If something is wrong with the service, it depends. If they are just obviously busy, I (or Jim) will just get someone else to the table to get anything we may need and of course still tip, if they are rude, I will say something directly to the waiter/waitress. I am not there to be treated rudely, but I will still tip, but only a 15% tip.