We had a good stay in Malcolm's apartment and we certainly recommend it to people visiting Edinburgh. The location was excellent for the Fringe, really close to some good pubs and food options and really close to lots of the major venues. One thing I would say is to be careful using the lifts in the apartment block itself. We ended up being stuck for an hour and a half on the first day and ended up having to be rescued by the fire service as the company that manages the block was not interested in helping.
Overall, good and would use it again.