It's called the PCEFIS and it was reviewed in the August issue of Aviation et Pilote. It has been mentioned, though I don't think reviewed, in some of the UK mags too.
As Aerobatic Flyer says, the Aviation et Pilote review found that the unit did get confused after a series of 60 degree banked climbing and descending turns.
I had a play around with one (on the ground only) in France during the summer. It seemed to work well. The display on the PDA was very clear, and it responded instantly to any change in attitude of the control unit box. Good integration with GPS data too, so you get navigation as well as attitude info on the same screen.
It seemed like a nice bit of kit, but I think that the UK agents want about £2,000 for it, and that's a few too many flying hours-worth for me!
The US manufacturer's web site is
here for anyone who wants details.