I liked the fairly fast pace of videos and the author's obvious confidence as he went through the lines.
The annotations seem very detailed too me, but could have used more evaluation symbols at the end of the lines. Pretty minor gripe though.
Comparing the two dvd's (Marshall and Open games) to others I've purchased, these rate very high. I prefer the faster paced presentation (like on these dvds), since it's simple enough for me to pause the video if I need more time to understand what's going on. Slower paced videos can get very boring to the point of distraction for some of us, and it's not easy to speed them up without potentially missing something. The author's knowledge of the lines was self-evident and this has not always been the case on other dvd's I've purchased in this format.
The author stepped right into a lot of main lines rather than skirt around the issues with early deviations by Black. Thus, he expounds the King's gambit accepted, Nf6 against the Bishop's opening, Nf6/d5 vs the Vienna etc etc. This means more theoretical knowledge required to play the lines, but it also means that once you know them, they are unlikely to be outdated.
60 year old, Fide 2120, opening side-stepper opinion