I will say that the location of Martin’s place and his communication is top notch.
Some things to keep in mind though (especially if you are visiting during the summer) is that it is right next to a main highway in Oslo and if you have the windows open—which you have to do if you are visiting during the summer because there is no air conditioning and no fan—it is extremely loud and still hot. A fan would go a long way. But, just keep that in mind if you are visiting during the summer.
Otherwise, great host!