I got the YLOD in September. I git it fixed and it lasted exactly 4 months. Cost me a hundred bucks and totally wasnt worth it.
Thankfully i had my data backed up on an external hd. But since i bought a superslim a lot didn't transfer from my fatboy. I lost all my ps and ps2 gamesaves and had to re-download all my psn stuff. If you get it fixed you can do a direct transfer bu i dont think its worth the money just to transfer. And from personal experience i can tell you that getting it fixed wont last long.