My stay here at Konstantino's place was absolutely brilliant. I would give him and the team at UPSTREET 5 Stars for this place. It's stylish and clean, has lots of storage space - super large for a studio - and was amazingly quiet, for being on the Main Street with all the shoppers below.
The check in process was smooth and the instructions/guide you gave, were beyond helpful.
With the flat's location between Monastiraki and Syntagma, this was perfect for getting around and for also getting to some of the major attractions. Lots of restaurant, bars and shopping options nearby. Just perfect. I would definitely book a stay here again.