Don't even bother going here during lunch hour as the line up is always crazy long (you either need to get here before 12pm or sometime after 1pm to avoid the lunch rush).
My favourite thing to get here is the fried calamari and the grilled octopus is also really delicious. The fish and chips seem really popular, but I can't vouch for them because there are so many other menu items to try.
The reason I highly recommend the calamari is because it's crispy, tender and thinly sliced. The cocktail sauce that comes with it, is a bit more vinegary than I would like, but the calamari is also great on it's own. You can also add a side of salad or fries, and the salad is a pretty good choice because the dressing is delicious -- not sure what's in it...the salad itself is nothing special, but the dressing really makes it worth the extra (but you'll probably already be stuffed from just eating the calamari, so save the salad for tomorrow's lunch).