Great place. Staff very friendly and helpful, good food, nice lodge, great skiing and lifts. I found hills here steeper than other western resorts I've skied. Blues here = black diamonds at others. Just so you know and are aware. That said, Lots of great hills for all levels.
Grand Targhee is awesome, and the app is helpful. I like the map, and notifications for new snow.
Not really liking the newly updated app. In particular the parking information. All you get is a colored dot, they don't start tracking until 70% full. When yo have to drive 120 miles to get there, it could be full in that amount of time.