Jacki and Jonny´s place is beautiful, very comfortable and very close to the city centre (where all the tourist attractions are located). It is also very convenient for lots of interesting bars, cafés and shops along "Leith Walk" and down to the port at Leith (-away from the city centre and the more touristy places). So it is perfect - whatever type of trip you have in mind.
I highly recommend that you stay there.