Great view of grand old buildings! Easy access to attractions, shops, restaurants, etc. David keeps the place very well-stocked and as strange as it seems, the bathtub was amazing. Luxurious with lots of room to relax and you can pick your own light color (really!).
You also get to practice Scotland's national sport, stair-climbing. Really, the stairs weren't so bad though if you struggle with stairs generally, you should find another option.
But if not, David's place is great!