I enjoyed my stay at Wendy's place - it is so much space and has a lot of historic character and antiques. The bed was comfy, as was the couch in the living room area. I loved having the espresso maker and water filter in the fridge as well.
One thing to note is that there is not a dryer if that's something you're expecting - it's not listed in the listing, but it also wasn't one of the items listed as not being included, so just don't make the same mistake I did and throw all your clothes in the washer and expect to wear any of them soon :). There is a clothes horse for drying, which worked out great!
This is an ideal location, as it's within walking distance to most major Old Town and New Town attractions, as well as to the train station and bus lines - and you literally look right out on the Royal Mile.
Overall, great experience and I would recommend.