This is a superbly equipped little service flat at the northern edge of Centro Historico immediately behind the Santo Domingo complex. The Peru street itself has not yet been smartened up (it probably soon will be) and when we arrived after dark and in the rain we were not initially impressed but we soon learned to enjoy it - lots of little shops and street food - and we never had any worries about security in the flat or outside it. With the windows shut you scarcely hear the street noise at all.
The best way to get there from the airport is the Metrobus Line 4 to the stop Republica de Chile.
We warmly recommend this flat.