Okay, I am a bit biased because I love the South Coast Plaza mall, and having a bridge leading to that mall from this hotel makes me happy. Another thing that makes me happy is the Westin signature fragrance that lightly and tastefully permeates the hotel. The same fragrance is present in their lotion and other toiletries. In fact, I have bought their toiletries online because it is probably my absolute favorite scent. Rooms and beds are nice. Have not heard neighbors through walls (my biggest peeve in hotels). Great service from most of the employees.
As others have mentioned, the parking fee is offensive. There seems to be plenty of open spots in the parking garage, but there is a charge for self-parking, as well as valet. I believe all hotels should offer their guests free parking, free internet, and a couple of free bottles of water each day--after all, it is the hospitality industry. Please know that the Westin is not the only hotel in the area that charges for these things, however. And the higher the room rate, the higher the parking and Wi-Fi charges.
Even with its couple of flaws, this Westin will be where I will stay next time I go back to the area.