Andermatt delivers very tasty off-piste skiing. Don't waste your time at the piste, go to Felsental, Unteralp, Winterhorn etc... So, very easy accessible off-piste skiing. Try also Disentis backyard after dump. Andermatt has quite low prices compared to other Swiss villages.
Not really wanting to create a crowd, let us just say that Andermatt rocks...yes, it is not large and the main gondola gets a little packed {nothing new for Europe}, but this hill is the steepest in Switzerland except for maybe Verbier {which has coverage and crowd problems usually}. Andermatt is quintessentially Swiss in every way, with badass mountain to match. The off-piste skiing is as good as any in the Swiss Alps.
This is a really sleepy, strange resort with quite limited skiing across 3 areas. You have to travel between them by an irregular mini-bus. The lifts are mostly ancient (all 5 of them!) and even in January I was queueing for 40 mins for the top lift. The skiing is lots of red and black runs, not good for intermediates or beginners and even then it is very limited.
The locals are friendly enough but not that welcoming, they make you feel like an outsider.
The town is really ugly with this massive military complex in the middle of it. The main street is quite traditional but apart from that.....
Oh yeh, the nighlife is diabolical with only 2 bars that are straight out of the 1980s.
So in short, I won't be going back.
Andermatt is a great place for off-pist sking (see Gemstock). There are just a few pists and yopu would get tired off them if you stay in the pists for a week.
You could also go to Disentis or Oberalp with the Glacier-express and then you could easily stay in the pists and enjoy your week.
Bu as I said, Andermatt is for the offpist. Lots of different routes, Felsentahl, the giraff etc etc.
It's a small village with little nightlife. Couple of good restaurants/bars. " discos in the weekend, but this ain't the place to go to for partying. This is for serious skiers!
See ya at Spycher!