I have only used Spinervals with coach Troy. I really like them and my Kurt Kinetic trainer. I have previewed many other DVD's but I like the coaching best. He tells you the set and why before you go into it. In other words what is the purpose of the interval training? Aerobic or Anaerobic? What are your weak spots? Hills or getting dropped? I try to have a purpose in training but then a rest day is a good time for a epic ride like the scenes in many other DVD's. Best of all You are in the seat.
I only use a Garmin 705 with Heart Rate monitor plus speed and cadence. No power meter.
Reading Carmichael's book now on the Time Crunched Cyclist. May look into this next.
I watch them on the flat screen in the living room. Use Apple TV and Wifi to link to computer. I have about 59 Spinerval DVD but that includes notes so not all are workouts. The Iron Girl ones are my favorite.
I started at 230 pounds (April 2012) and I am at 148 pounds now.
Please add suggestions!