There are no real cons
just little things for future updates - internal web browser (opening Safari every time although is quick and is not a big pain is not the best and it will be much better with internal browser). Comments for positions (which are available online). Visualization of possible outcome like on www - it will be a nice feature too. Oh, and please add a legend for markers
- it is easy to find out their meaning by yourself, but one could find it tricky. Thanks