We chose the 'no cat' option as my husband is allergic to cats. He didn't suffer any allergy symptoms so all traces of cat had been successfully removed.
Big positives for us about the flat were:
1) It was very quiet, no noise from the street or neighbours (we overslept everday!)
2) It was only a 2min walk to the bus stop to get in to the centre of Edinburgh.
3) All the lovely cafes, bars and restaurants of Leith are an easy 5-10min walk across the links.
We will certainly stay again, next time we are visiting family in Leith.