I bought this a few months ago, and it works quite well. But I'm going to be flying more on instruments while traveling, and wanted the AHRS capability of the standard Sentry, so I'm letting this one go. Purchased for $300, I'm happy to let it go to a deserving home for $200.
The Wilds of Connecticut 4B9 C-150M N704VL (Baby Blue)
I opted for a Sentry after fiddling with a Stratux for years and I couldn't be happier. It's the perfect form factor for our 150/152s and a powerful addition to my ipad Mini + Foreflight.