Good but has some issues.

I give it 4/5. A very solid, very universal app for pnp gaming. But its limitations are its poor UI.
Firstly, its information entry section for each page is so tiny (the white writing box)
Secondly, there is no larger complete sheet view, just the option to view all sheets. Basically no full screen sheet without the editing. (Like a pdf flip through).

Thats all, very good app.

Thevilln about Sheet Yourself: RPG Sheets