I just downloaded the application today when my friends mentioned it, and I have to say that it made my job running combat much easier. I didn't get to fully try it this week (since I was mainly using creatures I created myself), but just being able to track initiatives and HP damage was much easier. I was able to give each creature it's own initiative count and not be overwhelmed. In fact, combat was incredibly smooth, much more than normal. At the end of the session, I threw a few creatures at the party just to see how well it functioned, and it was great. It was so nice to be able to take into account effects like Ray of Enfeeblement completely and not worry I missed it somewhere.
I definitely plan to keep using this, as it will help cut down prep time and speed up combat (that can be a big complaint in our group). Not much to suggest right now, but I may have more as I use it more.
Thank you for making this.