I bought this app when it came out and was instantly impressed with it. For me, the ability to add my own financial sites is a major plus. There are so many great sites out there that I use often.
The interface is very clean and its a snap to go from site to site for any stock you want to follow. It comes with some of the top sites setup (Google, Yahoo, etc) and some big stocks, like Google and Apple, as examples.
The price is great too. Other apps are charging $5-$6. This app is a reason why I bought the iPad and why I love it.
MJunction about MarketScan