I currently work for a TV show being filmed not too far from Arkadia. I was introduced to the food by my bff who had ordered it before for a 2nd meal. The food arrived one evening and I could not honestly believe how good it was.
From the spanakopita down to the moussaka (or reverse) this place has some of the best food regardless of which culture it might have come from. We have had it again at work a few times (including once for large number catering) and the Arkadia standard has never disappointed. Not even a little.
Yes, the location leaves something to be desired. But if your looking for good, authentic (it's family run and they take pride) Greek or simply well seasoned, well cooked grub, then I would encourage you to check them out if you're in the area. The decor inside is fairly traditional and somewhat elegant. It seems, again, quite the juxtaposition to the Scarborough surroundings but I WOULD drive from the St. Clair West area out there if my significant other was in the mood for Greek.
When you get there, and if you can, speak with Joanne. I think she's the owner's daughter and she's fantastic. I can't wait until the next time I get to sample the goods at The Arkadia House.