I've been using Sound Studio for quite a while now, and have not had the problems others are reporting. The only times it has crashed on me have been when I plugged in or unplugged iMic while it was running. It has never lost its preferences or registration info, and has never locked up the whole computer. I routinely edit large files (200 - 300 MB, or about 20 - 30 minutes) on a low-end machine (iMac 500 MHz), but with a lot of RAM (640 MB). Sound Studio does appear to need a lot of real memory, so perhaps that is the crucial factor in whether it is stable or not.