Belated review of two visits we made to Andy's last year:
We first stumbled upon this restaurant one evening last summer when I met up with my son - who was back from uni - for a film and a meal. The owner, Petros, was very welcoming and attentive, and provided my son with advice on what to have, as he'd never eaten in a Greek restaurant before. The kleftiko was superb - it simply fell off the bone - and my son was also very taken with the Greek coffee that Petros had recommended (which my son, a tea drinker, had never tasted before). We were very impressed - not just by the tasty food, but also by Petros's hospitality.
The next time my son was in London he asked if we could go to Andy's again - a break from the norm, as up till then we'd always sought to sample a different cuisine each time we met.
Petros recognised us right away, and gave us a table at the window. The food was just as good as before, and at the end of the meal Petros brought some metaxa over - on the house, as was the dessert. The restaurant was not as crowded as the previous time, and we had ample time to chat. I even got Petros to pose for a couple of photos with my son, and he showed us a photo of Rowan Atkinson, who had been to the restaurant a day or two earlier.
In summary: really tasty Greek food (and lots of it!), great value for money, a lovely atmosphere, and excellent hospitality. I've recommended the restaurant to a couple of friends who live nearby. When summer comes around again I intend to sample the courtyard.