I've used this for 3 DnD campaigns and I love it. As a DM, it is important to have accessibility and a quick responses during an encounter. My focus has always been on storytelling, so being able to quickly determine a character's HP is key.
I do find that it is hard to select characters at the bottom of the screen, and the name/info can't be too long or it is cut off.
Another thing that would make this better is if there was an option to input the character's bloodied value for quick reference. Perhaps there could be an icon or color change once a character is bloodied.
Also, the option for creating characters of different level with the same name would be nice. I like that I can have a database of past characters to pull from, so more information options would be nice.
This app is awesome! I highly recommend this for any GM or DM. Now if it was available for iPad, that would be even better. I'd purchase the app if it was on the iPad.