I will concur with the other reviews, great central location next to the main areas for bars/restaurants, and 10mins walk or metro to any historical site/museum. The roof top has great views, saw the Orion constellation over the acropolis which was a bit of a fluke but perfect. The bar downstairs is loud until about 3am every night, but some ear plugs cut it out completely. Access is up two flights of stairs (no lift) so prob not great if you have youngsters or mobility problems.
Host was great, the hairdryer was missing and had a new one there within an hour.