My BEST EVER Disney stay/vacation was last July for my 40th.
I booked a YC/GF split. The YC was so-so. Had a beautiful water view room, though.
Then we moved to the GF.....the concierge CMs were waiting for us at the elevator when we got off on the 3rd floor. They were so excited to tell us were had been upgraded to the Walt Disney Suite!! It was a dream come true. I had dinner at Citricos on my bday and then a Wishes cruise on the Grand 1. I can honestly say I still get goosebumps when I think back on that absolutely wonderful GF stay.

Just out of this world!
You have to do it for your 40th!!!

It is so worth it! I always hem and haw about the cost of our concierge trips before we take them, but our GF stays almost always exceed all expectations and I only had a regret once (our 2006 Xmas stay - and it was not really due to the GF, but other issues I wrote about after we got back)
Lives4Disney