I just got off the Mariner this past Sunday, and stayed in Family Ocean view, 8200, which is directly overlooking the bow. The room was HUGE! Three rooms really. Large bedroom (with big closet, vanity, huge window, TV), living area (another huge closet, another TV, sofabed, 2 chairs with ottomans, and two more windows), and a bunk bed kids room, which had it's own door, and was big!
I will attempt to post some pictures of it.
If I cruise on the Voyager class again, I will HAVE to have this same cabin. It looks to be the largest FO on the ship. There was one next door to us, but I got a peek in, and it was much smaller than ours.
The other good thing was that it was in a secluded area, sort of a dead end- no one walking by our door at all.
Only draw back was being so far forward, if you are prone to seasickness, you may be bothered by the motion in high winds. We had 60 mile an hour winds the first night, but we loved the mild rocking.
Here's a link to my webshots page, which has LOTS of pictures, but the first 8 or so are of the FO cabin, 8200, with little descriptions of what you are looking at.