If you are looking for accommodation in Lugano, I think that USIhome is the better option for some reasons, and in this post I will try to define it.
1.- You will be close to USI (University), like 2 minutes more or less.
2.- USIhome is mainly for Erasmus, and... you can imagine the dinners, parties...
3.- It's no so much expensive, you can choose for a single room (500 CHF) or a shared room with other tenant (350 CHF).
4.- It's close to the city center and the supermarkets.
5.- You'll know some people from other countries and you can share experiences with all of them.
Ok, now take a look my single room...