Karen was really an awesome host: she welcomed us very heartly and made us feel at home immediately.
She took care of us during the ununsual icy wintertime at the beginning of March 2018 ("The Beast from the East") - always asked if we need anything - help, information, warm hats - she offered even some food in case supermarket were empty.
The flat itself is very cosy and comfortable. There you really find everything you need for an excellent stay in Edinbourgh. Especially the shower is really luxury.
It's not far away from the city center - a 20-30 minutes walk. But there are also a lot of bus stops around the corner. Also a lot of restaurants and shops can be found nearby in walking distance.
So we definitely recommend Karen as a host.