I stayed with Marthe in August 2019. I'm a middle aged mother of three stopping in Oslo as a single female traveler from the USA passing through to Molde for a yoga retreat. I was looking for something safe and close to all the activities, comfortable, and budget friendly. She speaks fluent English (as most in the city do). Her space covers all your needs, and has a Scandinavian decor which was fun to experience. The tram and bus stop is right out front, and being from rural Michigan where there is little mass transit, the Oslo mass transit system was a breeze for even someone like me who is barely accustomed to taking a bus or tram (buy electronic pass on App "Ruterbillett" and download a mass transit map prior to going). The Royal Palace is about 2 blocks down, and the main pier and parliament building a bit further down from the palace. There is a great breakfast cafe right by the Royal garden entry way a block away, and a sushi diner about 1/4 block from her place with standard Philadelphia/California rolls, etc). Travel light, as Oslonians do not use UBER - they don't need to. That does mean you have to drag a suitcase further than you would in the USA (like maybe a block, ;-) ). I made the mistake of bringing a 50 lb suitcase.