Unfortunately our visit to Konstantino's got off to a very bad start as we were unable to open the main building door with the key supplied. This is a bit of an issue with a lot of old apartments in Athens which often require a bit of fiddling about. I think the issue was caused by the fact that the key was a copy. It required us hanging about on the doorstep for about 90 minutes until one of his colleagues could attend. However, once in, and confident we could gain entry unaided we were very pleased with the apartment. It is very spacious with 2 equal sized bedrooms and decorated to a high standard. It was spotlessly clean with a lovely bathroom and all the equipment you could need.
As for position.. it is brilliant. About 5 minutes walk to The Acropolis and museum, and walking distance to anywhere else you want to go in Athens.