I used it a bit at University - most notably it had an Occam system on it that wasn't available on the Sun workstations.

I'm curious about running a VMS system although the admin side looks a bit daunting. The thing I'd really like to do is run X-Windows on an emulator on my home lab, just to see it run.

I had an Alpha AXP 150 workstation on my desk for a while, it ran X11 applications fine with no source changes required.