Olsztyn is not a Big Apple. U must remember that

There are about 175 000 lving in Olsztyn (and about 40000 from them are students). Two cinemas (one with several rooms ), two theaters, small but fine old town, several students club (most of them in Kortowo), a few good (or probably not bad) restaurants . Olsztyn live in the summer (Olsztyn artistic summer). Woods (the biggest area of forest in the city), and 13 lakes. Olsztyun is a capital to the voivodship Warmia & Mazury, but is not big town- is much, much smaller and uncomparable to the Kraków, Wroclaw, Gdansk, Poznan or other better known polish cities.
Olsztyn have a beautiful placed university campus (Kortowo).
But if u like the sound and live in the big city- I think Olsztyn is not the best option.