Saw this reviewed in PC Pilot, does anyone use it? What planes are supported (I need it as a stopgap for the PMDG 777 until FS2Crew comes out).

I use it. I don't know anout PMDG products, but I use it on all of my planes; default, free and paywares. It allows you to configure it to be plane specific, i.e. a B744 will have different procedures than a DHC6 Twotter.

 

There has been talk of an update but that was a while ago but it is still worth it in its current version.