This is the second time I stay at Radisson RED. The hotel is comfortable, clean, quiet, affordable, and convenient (only a 5 minute walk from the airport). There is a small gym available and a restaurant that is open until late. It is a modern hotel with a nice design, staff are polite and helpful. I only have one remark to make, and that is the restaurant is very expensive and does not do a very good job at catering for people with allergies. To make the hotel more inclusive, please add some more gluten-free options, and have some lower cost dishes on offer (for example, salads). Until then, I will probably buy food from elsewhere in to the hotel.
Overall, Radisson RED is a high quality, quiet and clean hotel, and it will continue to be my hotel of choice before travelling from Oslo airport.