I've been using SuperDuper for almost a year, and it's worked without a hitch. The one time I had a problem, and the backup stopped because of a corrupt file, I emailed tech support, and they (He? The main developer? Not sure) got back to me within the hour at 9 in the morning! Fantastic! Great software! Great tech. support! I highly recommend SuperDuper if you want a flawless, non-complicated way to clone your hard drive.