Great university with lots of bonuses for students (e.g. food coupons/subvention, free library check-ins, discount for public transportation, free/discounted sports classes, etc.). Everything is very centrally located, you are never more than 20 minutes away from the city centre by walking.
It is very easy to get a student part-time job and there is a lot of selection available.
Ljubljana is a very student-friendly city, as well as very environmentally sustainable. University courses are also very affordable.