Jim Ferguson aboard the Mischief Managed recently purchased a QK-A026.
He made a YouTube Video Guide to setting it up and had some really nice things to say about it:
After I bought this I had really high hopes for it. As it turns out my hopes have been mostly realized. I can connect iNavX on my iPad and MacENC on my Macintosh computer wirelessly and receive GPS and AIS data while the A026 is happily providing AIS target data to my Garmin GPSMap 3206 chart plotter. Anyway, I am ecstatic with the way this has worked out.