This is a great app, absolutely one of the most useful by far. Using the Smartstatus screen to get weather from your city of choice and current calendar events, while keeping the email/phone/SMS notify functions of the Pebble itself is a must have. I have had this app for almost a year and would not hesitate to recommend it to all Pebble owners, I just love it. I would have given this app 5 stars without hesitation, but left it at 4 since it still "seems" to break now and again, which might be something relating to how Apple/Pebble manage device battery consumption.
I ABSOLUTELY love the new "lost comms" vibrate and crossed icon feature. It lets you know right away when you left your phone behind (e.g. charging in the car while you hop out to do some shopping, or even left behind at the bar/restaurant). Its worth having the app just for that feature alone, if it saves you losing your phone.