We've been testing the new GDL 39 (3d model) and are very impressed with it.
It pairs with the Garmin Pilot app to provide an artificial Attitude indicator, which could really save your butt in an IMC instrument failure.
In a very preliminary first pass with the device, we're very impressed with it. The unit can be calibrated for level flight and then tracks seamlessly with the plane. We found the error rate to be +/- 1 degrees but thats it. Tracks smooth and instantly.
The key with the AHRS is to calibrate the GDL39 when it is in true level flight, at cruise or on true level taxi way.
Pics and Videos below, and more to come
