I've been using CycliStats since 2004, and have been very satisfied with the product. It's stable (never had a crash in the program) and has the most useful features. But perhaps the best "feature" with CycliStats is the user support, as others in this thread also has pointed out. Outstanding!
I have also ordered Edge 305, so perhaps it's best to send in a message to CycliStat support, and perhaps the Edge will be supported in a few days time ;-)