I had a play with one at a trade show when they were new.
Wow, nice! What were your impressions? 
It was kind of tempting as I think by far the cheapest real Unix desktop you could get at the time, but even in 1985 the practical utility of a Fat Mac with the same amount of RAM was much higher as while it wasn't Unix it had a lot more and much slicker apps. I don't recall now, but it may have been that although the hardware was cheap the OS / compilers / applications software cost a lot.
And the Amiga 1000 was just a few months behind the AT&T Unix PC ... may well have been out by the time I saw it. That had a lot of attractions of its own too.
My previous real Unix experience was a Zilog System 8000 at university (and Eunice on the VAX).
A year later I had MPW on a Mac Plus, which gave you Unix-like shell scripting, redirection, pipes, makefiles, compilers, debugger etc though in a cooperative multitasking no memory protection environment. So the programmer productivity was similar, but you had all the nice Mac applications. And another year and 68020 and i386 had much better performance, though also at a higher price.