Maureen's place is great. I was a bit worried at first that being on the Grassmarket would be too loud at night, but it really wasn't that bad at all. Revelers were out late on Saturday night but the other nights were pin-drop quiet.
The place is very cozy - comfortable bed, nice couch, good hot shower. Maureen was amazing with communication, providing detailed instructions on how to access the apartment and immediately answered any questions or concerns we had. Really great host, I'd highly recommend staying at her place!