Laura's place is lovely, and is in a great neighbourhood. I can highly recommend it.
I slept in the red room, as it would be away from the street and any traffic noise. The bed was exceptionally comfortable. The linens were clean and soft and there were plenty of pillows. There are also lots of towels and shampoo/conditioner available.
Although I didn't cook, the kitchen was well supplied had I wanted to. Tea, coffee, milk and sugar were provided, a nice touch.
A few minutes walk in one direction is the Royal Botanical Gardens, and in the other a lovely river path to Dean Village. There is a bus stop to town across the street in front of Hector's pub, where you will pick up and leave your keys. If you plan on walking around all day, do yourself a favour and take the bus to Princes Street. It's within a mile, but up a steep hill. From Waverly Station, look for the #29 bus stop, which lets you off 1/2 block from the flat. All very convenient.