Like others, I can't imagine paying money for this game. In fact, I can't imagine playing this game again for free. There are many other solitaire collections that look better, are easier to play, have more games and have more features.
I do like having all games numbered, so that you can try to beat ones that have previously stumped you.
I would like high scores that track time and number of moves. I like high scores that display the date, track your win and loss streak, remember your name, etc. The more documented a high score is, the better it is.
However, this isn't even the version of Freecell that I like. I like the harder version where you can only stack cards of the same suit. I have a stand-alone version I love called Seahaven Towers as well as the major solitaire suites (I prefer Solitaire Till Dawn).