Great place with good variety. Not too busy. The Spieljoch gondola takes you up to the top where you can stay all day, or do the longest valley return run in the Zillertal (a 7km red) which takes you all the way back to the village. Restaurant at the gondola middle station in recommended.
The gondola base station is beside the ski bus stop (every 15 minutes for the trip to Hochfugen) which is a bigger area, with a link to Kaltenbach, next door. Good nursery areas, numerous reds and several blacks.
Ski-pass covers the whole valley, so like wilco says, you can try out Zell, Mayrhofen, Hintertux (glacier open all year) for something different.
We are going back.