Don L.
Yelp
I stayed at the Comfort Hotel Xpress Central Station in Oslo and thought it was a really solid choice. The location honestly can't be beat since it's right across from the central station, which makes getting around Oslo (and even to the airport) super easy. You're also within walking distance of the Opera House, Karl Johans gate, and lots of restaurants and shops.
The hotel itself is clean, modern, and straightforward. Check-in is done at self-service kiosks, which was quick and painless, and the staff I interacted with were friendly and helpful. My room was on the smaller side, but it was well designed with good storage, a comfortable bed, and a nice shower. Wi-Fi worked perfectly too.
A couple of things to keep in mind: this isn't a full-service hotel. There's no daily housekeeping unless you ask, and there's no restaurant on site, just a breakfast bag you can buy or snacks at the "barception." If you want more variety, there are great bakeries and cafés right outside. Also, if you're sensitive to noise, ask for a courtyard-facing room since the station area can be lively at night.
Overall, I'd say this place is perfect if you want a clean, affordable, and super central base in Oslo without paying for extras you might not need. I'd definitely stay here again.