I have stayed at the GF twice. Once when it first opened, and I was all of about 16 and loved it, and once last year in October. This past trip, we actually had concierge level in the Main building, and I was terribly disappointed in the service. From calling us the wrong name all during check-in (even though we corrected them several times), from messing up PS requests, to not being able to handle a simple request like having a bottle of champagne chilled and sent up to the room -- I was actually told they would chill it for me, but I would need to come down before 9 o'clock and get it myself. I suppose I would have had to carry up the flutes and ice bucket myself as well? They told us our room was ready early (great), but led us up to the room (calling us by the wrong name again), only to have us stand outside the room with our carry-ons for half an hour while they did an inspection. Other things happened as well that lead me to believe that they hired idiots off the street to work the concierge lounge, and for us, the added price wasn't worth it. They didn't earn their "flagship" status for our October trip.
We booked a land/sea package for next year and found we had to stay at the GF because of the cabin category we selected. We were OK with that for all of 4 days until we figured that we were totally being overcharged to stay at a resort that had barely been OK. Yes, it's on the monorail. Yes, it's pretty. Yes, there is no typical standard view room (e.g., you will not overlook a parking lot, roof, or service area). But, good grief, is it too much to expect consistent service? We separated our land/sea package so we could stay at the BWI instead. For us, a much better location. We actually prefer any of the YC, BC, or BWI to the GF. It's totally a matter of personal preference, and hopefully, if you stay at the GF, you will have better luck in the service department than we did.
Whatever you decide, enjoy your trip!