Ive only had the Slingbox and associated app for about a month now, but I plan to use it during an overseas assignment. It has worked great on my iPhone 6, Microsoft Surface Pro, and wifes Surface 4 Pro. I have no qualms about the app this far, except for the guide option. It seems like every time you go to you have scroll/swipe through all of the channels, but they may be an issue with the cable/TV provider. I use DirecTV. Other than that everything works liked I wished it would!
Mcastle89 about SlingPlayer for iPhone, v3.8.44