The social scene in Vienna is a bit introverted, but once you make friends (especially using your Erasmus/university links which I found very helpful, and also other friends' flatmates and your own!) then you'll make loads more and they're SO welcoming – just say yes to everything! Vienna is also a gorgeous city with fantastic countryside for skiing (in winter) and cycling (in summer). It's also really close to places like Prague and Budapest (definitely worth a visit!). And contrary to popular belief it’s NOT more expensive than the UK - rent costs, for example, are MUCH cheaper! I had the chance to travel while I was there and visited Germany, other parts of Austria (excellent rail network with Vorteilskarte), Prague, Budapest and drove to Holland.