I do. Actually for the last six years I have been GS, I have waited for an upgrade to clear only twice at the airport. Once was LAX-ORD on a 320 and the other was on a 737 from DEN to ORD. The reason for the latter was that my original flight was cancelled and they overbooked that one for me in Y since F was booked full. Thankfully there were either misconnects, no shows or cancellations.

GS has been berry berry good to me. ^