The apartment is well maintained and very well located for the underground to the centre (about 1 minute walk) - trains run every 10 minutes and it is a 10 minute ride to the main central station so very convenient. The local area is very quiet although there is a great bar and Greek restaurant next door - the complimentary ouzos are plentiful.
Communication with Andreas was also very good - he was very helpful and very responsive replying within a couple of hours to any questions both before and during the stay.
Overall the apartment is good value for money and I would definitely recommend it.