Have stayed here now three times since July. For those that are familiar with the area, the hotel is on the deserted area opposite the rear entrance to the NORTH concourse of the Orange County Conv Center. If you are attending an event at the more popular SOUTH Concourse, it is over a mile walk w/o a real hope for a cab due to the Westin's isolated location.
If you have a car this is a non-issue (except for the ridiculous valet issue as mentioned above) but if you do not have a car and are attending an event at the South Concourse, staying at the connected Omni Rosen or Peabody save a TON of aggravation...although that wont get you any Starpoints...
Overall - loved the full suite with kitchen offered as a Platimun upgraded room. Becuase the property is over 50% timeshare designed units, this is a GREAT option for a suite for me - which is why I keep coming back.