XTrainer, I work in the S&C field and own the Intocombat series including the dvd's featuring Jeff Monson. The most common complaint regarding their collection (understandably so) is the price tag and the use of esoteric equipment not commonly found in neighborhood gyms including major chains. Simply put, you won't be able to pop it in, watch it and immediately go to the gym and hammer out the exact same circuits. It would take either buying accessories or spending time with a notepad and seeing how to tailor it to fit your situation.
If economics is not an issue and you are willing to modify, purchase accessories and make the circuits your own then I recommend them highly particularly the No-Gi Grappling edition. The circuits are exciting, challenging and can be altered hundreds of ways for use in the future (which certainly stretches out the money you paid for it - I continue to look mine over and I have had them for a while).
They are however flawed from a scientific standpoint for various reasons that don't need to be gone into further but if you are a stickler for evidence - you will only find empircial evidence from the fighters they trained (which is good but not enough to be REALLY impressive).
The circuits are fun and exciting and I would recommend them if you want to expirement with a different method of conditioning. My advice, though, is to go to
www.performbetter.com and look up the book "Strength and Conditioning for the Modern Gladiator" which was written by JC Santana (owner of Intocombat) and is not shipping out until mid-december/january but can be pre-ordered. It will cover most of the material found on the dvd's (each sport) plus more that is not covered. It is 300 pgs and should be exciting to read although I cannot vouch for its content because I don't have it yet. It will cost 54.95 which is a 20 spot over one DVD, but covers them all.
I hope this helps - Happy Holidays
