Ok - going against the curve here. I have several Spinervals AND CTS training dvds and I reach for the CTS over and over.

Spinervals is a little too focused on gearing for my taste whereas CTS is focused on effort, technique and cadence cadence cadence.

I love worrying more about perceived effort and my form than I do what gear I'm in. Plus - controlling my cadence translates (for me at least) to better riding out on the road.

CTS has some new workout dvds with 3 workouts to a single dvd and I love them.

Trust me - you'll need the towel under the bike.

my .02

T.