Lots of people think that the F cabins are the best value and very convenient. So do not be concerned.
We have always booked a G, one level up, the only difference being one large window instead of two portholes in the F. But otherwise, same cabin. You can see pictures on the rssc website here:
http://www.rssc.com/ships/suites.jsp?code=PAU&suitecode=8 You will love it, it's a great destination and a nice ship--we did our 20th on her, and are just getting geared up for our 4th trip in December!