We stayed at the Rome Flora this past July. My opinion on the property is a mixed bag. I was there with my two sons (18 and 13). We reserved a suite which suited us fine and allowed us to have three people in the room.

To get a suite on points, you need to call Marriott and state you want to reserve a suite. I then sent an e-mail to the property to confirm their approval to have three people in the suite. It was fine and the room was suited for up to 4 people. There was a king bed in the bedroom and a full size sofa bed. You can make online reservations for non-suites only. The room was a Cat 8 room + 85Euro per night. The five nights cost me US$600 including tax.

If you're going to use point, you will need to make the call. I plead ignorant on the Boscolo. Good luck!