Our stay at Derek's place was really pleasant. The location is perfect; nice & quiet neighborhood, the nearest bus stop is only a few minutes away and it's easily accessible by Uber too.
What we loved the most was the interior -- we think Derek decorated his place very beautifully. It felt really spacious too. We went as a family of five and there was enough place to sleep for all of us.
Unfortunately the shower started leaking to the neighbor downstairs on our 2nd day. Derek very quickly responded to this, the plumber came within hours while we were away and had a look at the shower. Fortunately the place also had a bath which we could use in lieu of the shower. Hopefully the shower will have been fixed for the next guests!
We will definitely consider staying at Derek's place again if we ever come back to Edinburgh.