I have the latest iOS (9.3) and find one annoying issue, there is no back key when you delve into your work outs... It's there for overview dashboard but it's not so intuitive when you have to come out of the app altogether and then go back in, please garmin put a back key on each section for a more user friendly interface.... So frustrating!!!
There's a arrow pointing left at the top left of the screen when you're looking at the details of a run. If you press that it will take you back to the snap shots screen.