Hi, I bought a nordic track treadmill in January of last year. It also has the I fit so I went to Sears and bought cards that you can use. They had a few varieties but are expensive. Also the Nordic Track website has a link to buy these. At Sears it cost 30.00 for a card. They had a walking program with 25 workouts,a jogging program with 25 workouts and a running program with 25 workouts. The running speed on the last goes to 8.5 miles an hour and runs from 45 minutes to 1 hr. A female voice talks and tell you when they are raising the incline and reducing the speed. They also sell a card that tests your vo2 max and then comes up with 10 workouts for you. I believe this was around 120.00 and a heartrate monitor.
I also checked out the Ifit website and had a very hard time gaining access because it said I had the wrong verson of windows explorer so I never tried the membership. I believe it's free at first.
I did the jogging and got used to it and could do it for 45 minutes with no problems but when it came to the 8.5 mile and hour runs for 45 minutes I could not keep up and took breaks through the workout. Well I hope this information helps and have fun with your treadmill.
Diana