I was in exchange here for one year in 2016. During that year I was welcomed by other teekkaris (technology students). There were all kinds of clubs and organisations to help me enjoy my stay. Local ESN INTO did a super great job by organising us different kind of events.
The university itself is located approximately 8km away from city centre. Luckily you didn’t have to go there often since there are shops and accommodation nearby. University is 24/7 open for its students and you can study there even in the middle of the night. I only slept at my accommodation since everything was so comfy at TUT.
Lecturers were really nice, they answered all our questions and didn’t mind that we used their first names. I even drank coffee with one lecturer and discussed about algorithms! Finnish universities themselves are so different to ours that this doesn’t even feel like studying. I strongly recommend applying there at least for your exchange!