And because the world is full of opinions.....
I much prefer the Westin over the Sheraton. I just stayed at the Westin two weeks ago. Neither property is particularly attractive. I've stayed at the Westin ten or so times in the last couple years. The club lounge is being renovated. The rooms are just OK. You need to call in advance if there are Platinum expectations such as room upgrades. I've always been offered a suite, and have always been put on the club floor.