Stay Away From The Cheaper Rooms
We recently took a two day trip to San Diego to see the Zoo on one day and Sea World the next. Unfortunately our stay here was the only disappointing part of the trip. We had seen a sale (200.00) on Expedia and decided last minute to book. The check in went well with friendly staff. However once we got to our room (227) it was thoroughly disappointing. The closet doors were off their track leaning into the closet. The view from our balcony was that of a multi (noisy) level parking structure and a tree. Another downer was we could not have our two year old on the balcony as he could of easily slipped through the wide fencing. The look and feel was dreary. We were also awoken twice to different noises. One was a dog barking continuously next door when its owners went out. The other was sliding balcony doors opening and closing repeatedly at 4am in the morning. The kicker was when my wife called it in, the security woke us up again about 15 minutes later knocking on OUR door! I would highly recommend staying away from the cheaper rooms it feels like you are not part of the resort and the room is very (motel) ordinary. 
A few of the positives worth noting are the location is excellent as you can easily choose between San Diego beach or Mission Bay. A half block away we had an excellent breakfast at World Famous overlooking the beach.