I use it everyday and stake my life on it..
As a pilot, I use the Garmin GPS system and it has XM weather uplink and it works REALLY WELL
A few things, in the smaller handheld GPS installs the XM is part of the antenna and that has the XM id on it.
All in all I say it is good stuff!
1988 Seaward Fox
no name yet (it's in pieces!)
Coconut Grove, Florida