The best place is Kyiv for good coffee is called Good Stay cafe. It is located in the Obolon district, and was founded by a guy passionate about making coffee right. I spent a summer studying to be a barista and I learned a lot from him. I have always been into coffee, I have read books about it and I even have coffee vacuum drip siphon in my house, yet I still had a lot to learn.
Now I am spoiled.
What I also like about this place is that you can play board games in there. They host Magic The Gathering tournaments. And there are interesting books to browse too! Photo albums about making of Game Of Thrones series were really cool.