I've been amazed by the performance of the X25-M 80gb running Windows 7 on my T61p. The only performance issue I have experienced thus far is an occasional delay on resume from sleep. Generally, the laptop will sleep all night and wake up the next day within seconds (literally less than 5 seconds to login screen). Sometimes, once or twice a week, there will be a delay of 3-5 minutes while it wakes up, during this time the HD light is on constant, so it seems to be taking a while to read something from the X25. Any idea what would be causing this? That is a longer delay than what I experienced with my prior 7200rpm spindle drive.