This is a thread dedicated to positive experiences with Time Machine. Here's my share: I just came back from a week long tour of the cordilleras. While in Sagada, I noticed a lot of beachballing on my MBP. I had a couple of external drives with me, one of which was a Snow Leopard Installation Drive. I used the latter to run Disk Utility, which reported errors on the drive. The problem was that the errors were unrepairable, and that the only way to fix the problem was to erase the hard drive completely. Although the computer was still running, it wasn't running well. Knowing very well that Time Machine performed a backup just before I left the house, and that my new data (videos and photos) were backed up in my external drive, I was not at all bothered with the situation. Rewriting a 500GB hard drive that's around 90% filled may be daunting, but not in this case. When I got home last night, I decided to perform one last Time Machine backup into my 2GB Time Capsule. After a the 20 minute process, I forced shutdown my MBP, plugged in my external Snow Leopard installer drive and went on to repartition my drive (repartition because that's the best and more effective way to erase a drive). I then installed Snow Leopard from scratch and on initial bootup, selected the option to transfer my data from a Time Machine backup. I then left it and went to sleep, knowing that the process will take hours. When I woke up this morning, it was all done! It was as if nothing had happened. I was back to my old Mac and everything was where they were the last time I used it. So, if you haven't done so yet, I strongly advice you to backup and use Time Machine now! It really is a savior.