I just got finished listening to a loaner pair of PMC FB1's - returned them to the dealer today.
Initial impressions are: Very impressive bass for such a small speaker/driver - transmission line really makes a huge difference. Although the bass was surprising the most noticeable and satisfying aspect was the tweeter (dynaudio). Highs were smoooooth and extended. Tweeter and mid integrated well esp. on female voice eg. Sarah Mclachlan. But when the bass got heavy things got a bit taxed. All in all I'd say quite a neutral speaker & quite good. Downsides were lack of bass and midrange information. But I'm listening in a large room, and am used to full range floor-standers.
For my audition I had the FB1's on stands, spaced about 30" from the side walls, 1 foot from the back wall and about 97" apart (outside to outside). Started with the speakers facing straight forward, but sounded best toed in to the point where the "inside" faces of the cabinet were no longer visible from the listening position (about 11.5'away). The FB1's are not my "cup of tea" but they certainly do a lot of things right - agile - they are QUICK, image well, have a decent soundstage height and (depth-wise) and sound good tone wise. Fem voice, piano and strings esp. One aspect that bothered me was that I couldn't get the soundstage to stretch beyond the inside of the speakers. This might be due to incorrect setup on my part or might just be the speakers. And even so, huge soundstage is not for everyone. Cheers!