Great app. I like shooting with filters. It feels more immediate than adding effects in post. This app is my favorite for this purpose. The UI is clean, the preset filters are well done.
My one critique is that the controls are located on two black semitransparent bars on the top and bottom of the screen which obscures a significant portion of the picture. Maybe this is not a problem on the newer taller format iPhone screens but it is on an iPhone 4s. The controls are white and only need subtle drop shadows to be legible, thus not obscuring the view. I hope the developers will consider this feature request. Then it will get 5 stars from me.
Note: This app used to be my favorite camera app but it was broken for many months. It would crash after a single picture. Glad to see it is fixed now, finally, so I gave it 4 instead of 1 star this time. I hope the developers will not be so sloppy in the future.
Matt from Toronto about Camera Plus Pro, v5.0