From my experience, I feel the old PS3 fats were built severely lacking in quality due to all the hardware failures. The first one I purchased when it was released failed within the first 3 months. It had stopped reading disks. My replacement unit lasted a little over 6 months before it stopped reading disks and the power supply failed. My third PS3 fat unit lasted about 8 months before I had the infamous yellow light of death. At that point, I was fed up and ended up doing the promotion of trading the old PS3 unit in for a new slim version. My PS3 slim has been running strong ever since with no issues. I have since purchased another PS3 slim and that unit has had no issues either. Although I prefer the looks of the PS3 fat version, at the end of the day, the only thing that matters to me is that is works. All of my friends who had the PS3 fat version had theirs fail as well. The most common was the disc reading laser failing. One friend of mine just had is launch day PS3 fat fail about a month ago. His stopped reading discs. Out of my friends who now have the slim version, none have had any issues whatsoever. I think the PS3 slims are much quieter compared to the fats. I don't notice any sound when playing a blu ray or a game.