I stayed in Diana's place for a month and it was lovely. The apartment is very bright, and comfortable. It is about a 3-5 minute walk to princess street but even around the corner there are many pubs and restaurants - the west end is a very lively place to be ! However, the street itself is very safe and quiet, with access to private gardens. While I didn't have a car, there is a lot of street parking available in front of the flat.
Diana was very responsive to my questions. I would highly recommend the place, and diana as a host! :)