Initially disappointed when getting my first mac - where's spider/freecell? Realised had to look to the web and there are lots out there. Solavant was fourth download and by far the best. It has the look and feel i would expect from a mac (some out there are still windows 3.11) and to be honest I'd rather apple approach these guys to ship this free instead of the over animated backgammon/draughts/othello that you do get. The design of the picture cards and the dock bar logo are both simple and sexy and simple additions such as the rules drawer and card size make this product great.
On the games. I am still to play them all and to be honest I am starting to find one or two favourites - even became the first to synch a 'hardest' game. There's also a feel that you are joining a community (something I have noticed with the mac generally) and that the product will not stand still and continually improve.
Finally the 2 games that I haven't bothered to play are freecell and spider.