This is a fantastic app for me -- I have a Garmin 305 and use it when road and mountain biking. It downloads from the Edge perfectly, and shows a map, my route, and all the info from along the way (speed, altitude, gradient, etc.).
It is WAY better than the Garmin software -- both the PC and Mac versions of it. I was using the Garmin software for a while because I didn't know this existed... then a friend pointed it out and I tried it out and bought a license within an hour. It's already excellent and it's maturing and updated quite frequently.
Always great to find small software developers to come out with specialized Mac applications like this. Hooray for Montebello Software (I wonder whether it's named after the 5 mile, 2200 foot climb in Cupertino, CA... looking at the web site I sorta think so ;-)