Looks interesting. One thing that I liked was that it is a stand alone single file program needing no install which makes it easily mobile, you could throw it on a flash drive.
The graphics also look nice.
Downside, in my opinion, is the fact that Klondike seems to not allow you to move a partial pile. Of course I just took a glance so there may be something in the setting to allow this. Klondike is my favorite form of solitaire and I win a lot of games by moving partial piles to get to a card.
Looks like a nice package.