Hey Russ
My wife and I have been using the software for over a week now.
We both have a Kirk Kinetic as the power source.
You can use your Garmin watch same time as the software. (turn off auto lap and hit the lap button for the intervals)
I am currently doing the advance base. (Very challenging)

Overall my wife and I really like the program and the features (it’s like having a coach yell at us when we are slacking)

Nate (co founder) is on here (ST) and can answer any questions you have.

Mike