Ok, no downloadable puzzles.
It is basically 3 full years worth of puzzles, ripped straight from the NYT between Jan of 2003 and Dec. of 2006.
You can go through a calendar and pick any one of the dates. It also grades you depending on time taken and the number of hints used. A+/- type scale.
It does have local wifi multiplayer.
So, yeah, its pretty fun. The interface is easy to get around, it has various zoom options, the writing recognition is pretty intuitive.
Worth 14 bucks really.