As the other guests were writing - the apartment isn't exactly at that place it is shown in description but we knew that, so it was no problem to go a little bit further from the train Central station. A neighbourhood is quiet and I can say location is really nice. 10 minutes on foot and you are at Central train station. 20-30 minutes and you are at the other highlights of the city. So if you have no problems with a walking it is really good point from where you can start your jorney while exploring Oslo.
A communication with a host was very good, he has send comprehensive instructions about check-in, check-out and other important things. What's more he made an effort to check-in earlier. We didn't meet the host but he quickly and polite responsed to all our questions so there were no problem about it.
An apartment was clean, we had almost everything we need (and like other guests where writing - no oven, just stove, but we knew that before we arrive and host has informed us additionally). Everything else was nice: balcony, wi-fi (the host left an useful information at apartment but what about wifi - the one, that was mentioned on the information brochure wasn't corret, so ask a host, maybe he have to specify wi-fi connection details for you), microwave, stove, dishwasher, hair dryer, heated floor in the bathroom, washing machine and dryer, other facilities - it made our stay comfortable and nice. Also there are very comfortable bed and pillows at bedroom. Quiet neighbours.
We had a little difficult to find a way to the roof terrace since the stairs we could use from our floor were closed but later we have found another way - just use an elevator.
Nothing bad to say, nice, simple, clean place to stay on your holidays.