I have used this app for some time now and really like it. With this app you choose a picture and the app will give the picture the effect of being hand drawn. There are different settings for how detailed you want the picture to be and if you want it to be in color or black and white. One thing I use this app for is to make screen savers for my Nook. The Nook (or Kindle for that matter) can't show color but by using this app you can make some really nice screen savers from your pictures.
The pictures come out looking great and it is a great app. However at $3.99 it is a little pricey. I would watch for it to go on sale but it is an app that I would keep an eye on and try to pick it up. Even if you picked it up at $3.99 I think most people would be happy with it.