I'm at 72% suite u/g -- all domestic. More Sheraton than Westin or W. Some of the "no-suite u/gs" had extenuating circumstances such as one Sheraton property w/o suites (offered Club level w/free internet and free restaurant full bkfst) and another large Sheraton which had suites in house but offered a very spacious, elegantly furnished Towers room with a number of above-and-beyond amenities. I improve my chances by booking whenever possible those properties known to be compliant with SPG procedures.