Trent,
I have an iLevil 3AW in my Wittman Tailwind. I used it exclusively for the first 400 hours or so and like it. I have since went to a GRT Sport EX not because the iLevil didn't work but because I wanted to add an autopilot. I used an iPad with WingX on it to connect to the iLevil. Now it is a back up which I like because it can be totally independent of my other systems. If I have a power failure, the iLevil unit; because it has a battery backup, will give me real airspeed, altitude, attitude info, ADSB in and navigation for hours.

The folks at iLevil have always been good to work with.
Keith