I've stayed in the Mariner's RFS in cabin #9394 Deck 9 Aft.
There were four of us 2 adults 2 boys (12&13)
Plenty of room and nice to have the two bathrooms! Boys take forever getting ready!
There is a TV, Stereo, DVD/VCR Surround sound, ect in the Sitting room.
There is a TV in the Adult Bedroom but there is not a tv in the kids bedroom.
You will have access to the Conceirge room where you can check out Movies - we did take out a few dvd's, I think the boys watched one - way too much to do to watch movies...it was much better to watch the ocean from the balcony.
Tons of Storage.
Balcony is very large and feels like it's split in two, with one side having three loungers and the other a larger table and a couple of regular sitting chairs.
Our steward - Philip, was excellent and seemed to be around when ever I had a question. We didn't bother him too much. The boys actually had a great time with him.
As I stated you will have access to the Conceirge room which I found relaxing for a couple of drinks and munchies..but you already know that since you've been in a gs before.
I truely enjoyed the space and privacy that the RFS offers.