I had a similar experience as theophilus.
After ordering, but before receiving, my 3TB MBL I read these forums and wondered about returning it unopened.
I decided to try it, but not update the firmware - it came with 02.11.09-053. Thank you guys for this advice.
Initially, it was a dog. Slow, never stopped working the disk and never slept. I had not put much data on it so after a day of this I did full factory restore and low and behold, after that it has behaved itself and performed as I wanted. It also goes to sleep with a nice blue light.
If I steer clear of Windows 8 and file versioning then I don’t see any reason to upgrade the firmware in future.
Of course, it is early days for me so maybe I am being too optimistic…
Don.