I just bought an AEBSn after returning a Time Capsule last week. I loved the TC but it kept giving errors of various kinds, and 2 total lockups; I also was not thrilled with the idea of the hard drive and router in a single device (single point of failure and all that). anyway, I got the AEBSn setup very easily, and everything is great; firmware is at 7.3 (what it came with). I know that 7.3.1 added Time Machine compatibility for usb hard drives, and maybe some other features. What I would like to know is the general satisfaction level of other users, and if this version of firmware has caused any new problems.