We have several cruises with Celebrity under our belts, but this was our first Princess cruise and my sister's very first cruise.
Embarkation in Los Angeles was smooth. A little wait time. It is done differently than Celebrity; which I tried not to keep doing a mental comparison during this cruise.
Our cabin had a great extended (toward the aft) private balcony. Our mini-suite was home for three of us during this cruise. Space ok, but problems during most of the cruise with plumbing. (toilet to be specific). We are over 55 and get up during the night for obvious reasons. Many nights I would get back into bed and wait to hear the delayed woosh before I could comfortably fall back asleep. It also happened during the day. The problem was supposedly solved several times.
E728 Mini-suite:
interior space adequate for 3 adults. hallway not busy or noisy. no external noise from anywhere. location perfect for going to main dining room and to get to piazza, etc. balcony was extended / curved toward the back of the ship, totally private balcony. plumbing a bit of a problem. self service laundromat easy walk down the hall toward mid ship.