I just burned my last of 4 certs for this year, using it at the Churchill London in February.
I was assigned a 53 s/meter Regency Suite, which judging by the pictures on the website is similar to the one I got several years ago with a certificate upgrade.
Overall this was a great perk this year, 2 used in BKK, 1 in SIN and one in London. I would love it if they bumped the # to 6, but I'll take 4.