I lived in Tallinn for four months. It's a great city overall. Life quality is excellent with transportations and everything else working excellently. I loved the fact that you can travel to other countries easily and inexpensively (Russia, Finland, Sweden, Latvia, etc.). At the same time, I think the city gets monotonous fast compared to other places where I lived in a similar size. Estonian people don't appear to be very active. It's understandable because most of them are hard-working and outside of the tech-scene lots of people and students work two jobs. It is not so international, and flight connections are not so many. It's also harder to make friends compared to other cities. Additionally, it's getting more and more expensive. Overall, I wouldn't live there again. There are many better cities around, but it was fascinating to live there for a while.