It makes a decent base if you are looking for a place with other things to do than a ski village. It's a proper city with other cultural diversions. And it's a beautiful medieval town.
The only problem is that the ski buses are not organised very well and run on a shockingly poor schedule. They only run once an hour (if that), with the first bus not leaving the city until 9.00 am (although to Stubai there is an earlier bus, but the trip takes 90 minutes). When I was there, the bus drivers had a mix up and didn't know where they were supposed to go, which was very disappointing as we drove around the city in a packed bus for 30 minutes before getting to a parking lot where everyone was told to get off and stand around for a while.
We also had a problem with the tourist office opening hours, and could not buy the discounted all inclusive package for Stubai because the office didn't open until after the buses departed. We ended up paying twice as much as we'd expected. Not a brilliant way of organsing things.
If you have a car, I think it's a great option. But without skiing directly in the city (apart from one area that I believe has yet to open this season), relying on the ski buses is a little annoying.