Doing my first stay at the Sofitel Sukhumvit in mid-Dec. A longtime loyal Sheraton Grande Sukhumvit patron - but I'm at 100 nights with SPG and since I don't get anything more, thought I'd stay someplace else. Might as well put my Plat benefits to the test. So what should I expect? Free breakfast, happy hour/lounge access?, free internet?, late check out?, upgrade?. What is guaranteed - what is on availability?