Been about 30 days (took a while before I had time to install) and it has worked great. I ended up mounting it using a screw to a piece of wood I hung from the ceiling, when I mounted it on the opener it moved too much. Also, I mounted the target to a thin board not much larger then the target. I then mounted the board to the garage door using the extra two sided sticky tape that was in the package. I was able to place the target in a surface that was not flat.
iPhone App works fine with no issues.