Sufferfest videos

Their website is  pretty descriptive including a  break down of the intervals and rest periods in each video. I just looked at the description for "Revolver" Which I do not own and found this:

What you will find is either s structured interval workout synced with the videos, on screen prompts, and audio cues or a race simulation video with a premise and once again on screen prompts and sounds to match various scenarios. Sufferfest uses a 10 pt RPE scale that you could easily transfer to HR or power if you wanted to.

As pointed out above, the description for each video is pretty comprehensive. It's a visual video and you don't need a computerized trainer. I do them using TrainerRoad because that allows me to use virtual power to know exactly what the target is for each effort.

This is nothing like watching bike racing, the videos have clear instructions about what to do, there are climbs, time trialing, attacks, tempo riding, they are demanding and truly entertaining (if you enjoy suffering).

As long as you are in decent shape you can do these videos, especially because everything is relative. The video will have an RPE cue for each segment, and if you use TrainerRoad, the efforts will be related to your FTP, so it will be tailored to your level of fitness.

I just bought all 12 a few days ago and have tried Angels, Revolver and Downward Spiral.

The various videos are designed for different efforts such as cadence, climbing, TT, etc. The videos give you a suggested tempo and, as mentioned above, a difficulty based on a 1-10 scale. You are responsible for the effort you give based on that information.  The videos cue the intervals and recovery, and an occasional unexpected break-away. Since the effort is based on your perception you will improve/go harder as you use the videos more. I did Downward Spiral this morning and my legs collapsed when I got off the bike , but I'm sure I have a LOT of improvement to go.

For me personally, this is the single greatest reason to also use Trainer Road in tandem with the Sufferfest videos.  I'm sure it varies by individual, but I frequently second guess my effort.  Sometimes I'm "not feeling it" so my "10" today may be less than my "10" yesterday.  

With Trainer Road, once you've set your FTP, the program tells you if you're not producing at the level you should be.  This is extremely helpful for me.  So, when I'm doing a Sufferfest video and there is an attack and I'm required to suddenly sprint as hard (level 10 effort) as I can I have a tangible threshold to meet (at minimum).  This is extremely valuable to me and I feel I'm getting so much more out of my workouts.