Reason for swap, well I was on my second Nav VI due to screen ghosting and had read great reviews on the XT. Got to say, it is a lot quicker and slicker than the Navs, also you can update via wireless. You can also transfer routes etc via the Garmin My Drive app, which also passes traffic, cameras and loads of other bits to the Nav.
Disadvantages, It doesn't integrate with the wonder wheel (but I never used that function anyway). There is no My Bike info, but again I never looked at that information. Lastly you have to space the new nav further out, as the screen is slightly larger, the release for the Nav is on the top, so no remote release. So you have to use some kind of tool to release it, I'm using a short trim removal tool that you push over the top and down to release, otherwise it won't come out. So built in security as well
