Stayed at the Westin during a business trip to Guam and very glad I did. Some of my colleagues went with nearby hotel and decided to go with the Westin on future trips. The location is great, right on the beach and near lots of shopping. And for business, it's very close to the main road to get you to around the island.
My room was very pleasant. Plenty of room, comfortable bed, nice desk and fast wifi for working on my laptop. It was always perfectly clean.
The fitness room is has plenty of new equipment and nice views.
I especially like the food offered. Both the Taste restaurant's buffet breakfast and the Westin Club are amazing. Good food, drinks, not over crowded, great staff. If your reservation doesn't included breakfast or the club, they are both worth it.
I like Westin in general, but this one feels especially nice. Others could learn from it.