If it's stable and reliable, it might be a good solution for saving some money and like you said Mike, wiring too. All this assumes you're talking about day VFR flying only. I like the idea of being able to have a nearly blank panel and attach an iPhone/iPad/iPad mini first without committing to $5000 + for a hard mounted-system. Technology is changing so rapidly, and once built, I plan on keeping my aircraft a while. I don't want to feel like I need to update/replace my panel every 6 or 7 years. I can't get a laptop to last more than 4 years! Then again, it is probably better to install everything before the entire plane is finished.
Levil's site says they are coming out with a Plus version that integrates engine monitoring. It's already priced at $1995. Add a new iPad, Wing X subscription, and an engine sensor kit + RDAC...you're then getting close to having the same money invested as a hard-mounted system. Also, I think I would still want a backup ASI and compass, at a minimum. This video shows AvWeb testing the older version that Levil has:
http://www.youtube.com/watch?v=VscxbLCwU3wI’d be interested to see what others think too!
I couldn't help myself. It's not completely accurate, but was fun to stich all the images together. Panel image using the iPhone and iPad mini with the iLevil driving the AHRS and ADS-B. Reality...maybe one day :lol