I have 3 Spinerval DVD's for sale. I'll take $20 each and that includes shipping. I got them last year for Christmas and haven't used them. I looked at each one time.
I have BIG GEAR STRENGTH that is 55 minutes and 9.3 difficulty--big gear/low cadence strength building. It helps you develop strength and increase power output & speed.
I have 16.0 AERO BASE BUILDER I; that's 80 minutes. It's Interval Sessions to develop your aerobic base and endurance in post & pre season.
And the last one is 23.0 TIME SAVER I. It has 3 30 minute workouts. A is Technique and is 7.5 difficulty. B is Tempo/TT with a difficulty of 9.5. C is Power/Sprint and has a 9.9 difficulty rating.