I own a Neolucida and I wanted to see the difference in how this app and my Neolucida would compare with one another, and I have to say for basic use its a fantastic app, Im still trying to get used to the extra features, but for using it as I would my Neolucida, the learning curve was definitely shorter, I was able to jump in and work on drawings right away compared to the setup of the Neolucida and the bit of getting used to look thru it, but they are fantastic, if you dont own a camera Lucida, this is definitely an affordable way of getting one out of your iPhone or iPad.
Dorknightrising about Camera Lucida™: AR Drawing, v7.0