Again, I don't know why people over-analyze these issues! Things usually work out like they are supposed to.
I stayed here June 11-16, 2019. I am Diamond, and I ignore the UG offers pre check in. I had my son on the trip, who would require a separate bed. Many hotels (all on this same trip do not charge for that) but the Conrad did.
While checking in they offered the "presidential Suite" for an extra 150SG$ a night, which wasn't that much more than they would charge for an extra bed, so I took it, It was very spacious but more room than we needed, The room was a bit run down (older, more appropriately) and did not have the controls and outlets of more modern hotels.
The Exec lounge was nice but for some reason people seem to spend way more time analyzing whether they will get in or how nice it is, instead of just enjoying their trip and experience.