I have the 20 GB pro model from 2007 and had it sent in for repair/replacement in June of 2009 for RROD. The console worked brilliantly after I got it back up until this past December. I got Gears of War 3 for christmas, put the game in and my Xbox sounded like it was going to explode trying to read the disc and wouldn't even pull up the start up screen. I also got a few of the older Lego games for christmas and I had read online that there was an issue with older xbox systems not being able to read the newer games so I popped in Lego Indiana Jones 2 (an older style game) and experienced further freezing to the point where the disc wouldn't boot up to the start up screen. I determined this to be an issue with the disc reader because I am able to play downloaded demos just fine. I first went on to microsoft's website to see what could be done about this. They had a list of things for me to try like clearing system cache, trying without the hard drive, leave it unplugged for a little bit and try again, etc etc. Did all that myself with no success so I called microsoft to complain. Went through the same steps with a rep on the phone who then told me that it'd be $99 to fix. That's ridiculous. I shouldn't have to pay to fix a console that worked perfectly fine up until the firmware update. I want to know what can be done about this, but nobody seems to have a good answer at microsoft, so I'm hoping other users on the forums can help guide me.