Posted April 25th, 2013, 06:07 PM
Sorry, no photos online but we did this on Magic (one twin on the couch, the other on the mattress) and had no issues. There is not a huge amount of space in the 'aisle', but there is enough to walk past. This was in a balcony, last May.
We tried this on Splendor in November and were denied until I escalated to the platinum desk. Even then, it took a bit of convincing. They claimed it was a safety issue, which admittedly isn't entirely
crazy. Though I'm not sure how having 2 people in upper bunks in the theoretical smoke-filled cabin is safer
This was in an inside cabin, which has a tighter floor plan and really does leave almost nowhere to walk with a mattress on the floor. This was in November. It was not stated that the rules (or enforcement) had changed, but it is possible, so FYI that you may not be allowed to have the mattress on the floor at all.
The Splendor cruise influenced our decision to take our most recent cruise on on MSC where (some of) the balconies have a double sleeper sofa... what a great idea! In fact, on Poesia the "four on the floor" quads are aft balconies.
She is being replaced by Divina shortly, which has more
of these types of quads, but they all appear to be side balconies.
I agree with CB: let him nap on the bed. Otherwise you'll lose the floor space 24x7. If you do it just at night, they will pull the mattress down each night. And tip a bit extra: moving that mattress up and down is no small feat.