I just bought/tried/returned one. The good: XM Radio, weather, and GPS all-in-one Gorgeous screen Sensitive receiver The bad: Downloading aerial and topo maps is like pulling teeth. You do it as a bajillion separate downloads of a few sq. miles each from the crappiest website ever made. No joking. No batch downloads, nada. It's HORRIBLE. Accessories are difficult/impossible to find. Runs on a battery pack, and unless you engage all the battery saving features (which pretty much renders it useless), you'll be dead in an hour or so. Recharging it? You better have AC power. See the accessories gripe above as well. The weather is craptastic. Takes a long time to download, and it's jaggy/blotchy -- i.e. highly crappy resolution. Track files are in a proprietary format that no converter I could find will handle - so forget geotagging photos. No NMEA - no way to allow it to send data to any other app but their highly crappy app. Overall: GREAT idea, HORRID execution in firmware, software, and web site. Hardware is nice, but they really need a AA battery solution. Replaced it with a Garmin Colorado 400t and am happy.