Note that the trial includes unlimited playing with a handful of games (including Klondike, what most people think of when they say Solitaire thanks to Windows), and one-minute snapshots of the various other games.

I'd also like more customizability to the rules, but the UI is very slick, the effects game-enhancing instead of distracting, and the breadth of games (I registered it and am very happy I did!) promises thousands of hours of enjoyment!