Sunbank House is easily walkable to downtown Perth, and I feel preferable to staying downtown. There is even a quiet walk over a railway bridge (with safe pedestrian walkway).
Even though located on a main road, our front facing room was eminently quiet, clean and spacious.
Unable to decide on any downtown restaurants, had lunch at a pub recommended by our host, we opted for dinner at Sunbank, and the three of us were all impressed by the quality and modest cost of our meals.
We can honestly recommend Sunbank House.