Ingrid's place is an excellent base for exploring Oslo! It's central and has all the amenities that you could want.
Ingrid herself was a delightfully charming host, she gave me a very warm welcome and was happy to show me around the space and help me find all the little useful things that you need.
I would definitely stay at Ingrid's again and recommend it to all of my friends staying in Oslo, the private patio was a particular delight :D