I just finished installing and testing out my latest map update. This one had some significant road changes unlike the one I did 2 years ago which didn't seem to have many changes at all. Seems well worth the 150 bucks. My only complaint is that it is such a cumbersome procedure and took almost an hour and a half to complete with the necessary software update + the map update. Seems like it could have been made much simpler like many other cars. Oh well.