My 23 year old daughter, husband and I walked through the park at 9pm in the dark, and did not feel unsafe. Just look confident, don't linger, keep walking. We did not see anything to give alarm. However, inside the station, we did see several characters that we pretty much pegged as there to run a scam or pick pocket, so guard you belongings well. Also, FYI- the only toilets there are pay toilets; be prepared to shell out 100Kr for the toilet. Be aware too, that there are many shops there, but all will be closed by the time to get there. There is a Burger King too, but it closes at 10pm, so be sure you have all you need before you go. Oh, and the staff there at the counters did NOT seem overly friendly. But for the most part it was clean. Not hardly any benches or places to sit though, if you have to wait a long time.