TLDR - I have bought several of these and will buy more just to have on the shelf for the future.
I use these regularly for a variety of effects. I think, short of buying a particular
effect by Andy Nyman, this is the best marked deck available. One thing I would like to see
incorporated into marked decks in the future is an easy system for doing "color sense" type effects,
but one could easily create this marking system by modifying one of these decks in a clever way.