Marantan House is excellently situated for tourists such as ourselves. So close to the train, buses and to many lovely restaurants, cafes and take away food venues. We were able to walk to many sight seeing destinations in London. (It did help that the weather was perfect!). Our room was quiet with a lovely outlook over gardens. The bed was comfortable and good en suite.
Be prepared for a walk up a number of stairs if bringing heavy suitcases, otherwise it was great.