Monica's place was just as described - the room is spacious, airy and bright, replete with a sofa and a bookshelf for those times when it's raining and you'd just like to stay in (which I did an entire day during my stay). The bathroom is well-equipped, and is shared with the guests in the other room. Monica was gracious enough to let me use the kitchen for the basics when needed.
Location-wise, it's right in the heart of the city, within walking distance from most of Edinburgh's must-do's. Buses are easily available as well.
Monica is a wonderful and thoughtful host, and she has great suggestions on everything a visitor would need. Izzy, the cat, is her friendly co-host who'll come say hi every now and then. :)
All in all, my stay was comfortable, and just what I needed for my time in Edinburgh. I would highly recommend it.