I moved to the neighborhood recently. On moving day, I needed to make some change in order to give equal tip to each of my movers. I walked in to Plaka and, sounding kind of helpless, asked the waitress if she could break a $20. She understood, and helped me out. I figured we should go back for dinner that night. The food was pretty tasty, and they gave us a free piece of baklava and a couple drink tickets to say welcome to the neighborhood. Nice touch.
Since then I've been back a couple of times. The food is reasonably tasty and satisfying without being overly heavy. I particularly like the moussaka, and I the grilled seasoned vegetables they stick on the side of many of their entrees. I haven't yet had chance to try the breakfast menu but I've heard good things and am looking forward to it.
I'm not sure what's up with the negative reviews on the service. I've been treated fine every time. Seems like with both negative reviews being posted on the same day, maybe the waitress in question was having a bad day? Anyways, I like having this place around the block, so if for nothing other than selfish reasons I encourage my fellow yelpers to give it a shot!