First, I love and recommend GM Wolff's double attack tactics course - there are some real gems in there, especially between lessons 20 and 30.  As I was sweating through them, I found myself wanting to write down the lesson numbers for later reference; that brings me to the second thing...

It would be cool to be able to bookmark/favorite or even tag lessons you've taken for further review.  Bookmarked lessons could make up a user-specific custom "course" (really just a list of lessons from various courses) that the user could access just like the normal courses.  If tagging were allowed ("Checkmates," "Beauties," "Forks"), then I suppose they could form the basis for multiple custom lists (maybe a bit over the top).  Anyway, just a thought - not an essential feature obviously, but I'd sure use it.  :)

Cheers!

yeah... that's a really good idea!

Yes, I think the GM Wolff courses are great also. And I think we may be seeing some new Chess Mentor courses from GM Wolff in the near future. 

I agree with the bookmarking, Idea.  It is one that I've wanted to suggest myself.  I have the cd version of Mentor and finding particular lessons on it is very difficult.  It is much easier here and when I upgrade to diamond membership after the upcoming proposed changes are made.  I will be using the online version much more.  It would be great to mark certain lessons as completely mastered therefore I don't need to ever come back to it vs. I mangaged to get the solution but I will forget it in a few days and need to come back to this lesson. 

this is a really good idea.