I was told by a REN Manager that this and any other preferences in your profile will backfire if an upgrade is your goal. Even a bed preference as they try to fill and put these items in your room beforehand and are reluctant to make changes. And her property (Tampa REN) really had nothing to offer as far as upgrades go except a room on the club level. They will assume a PLT wants a King Bed.

Certainally my club level requests in the past via comment and VC are usually ignored.

Just passing this along, service at this property is always hit or miss.