I'm a huge fan of pubs and I'm always willing to visit different ones. I've been there last Saturday and found the place very nice, even being in a large group.
They seem to have only one TV and where I was sitting I wasn't able to see it - this, for me, is a bonus. I hate the guy who had the idea of putting TVs in bars - I go out with my friends for chatting and fun, I can watch my own TV at home. So, Fionn MacCools is a very nice place for hanging with your friends, going on a date, whatever, because the TV won't steal your partners attention.
The food is very good and comes in reasonable portions. I ordered a Guinness Poutine and could share it with my husband. I strongly recommend the only Bailey's cocktail they offer, the name is something like Irish Cold Coffee Lalala I Can't Recall. Very good.
Oh, very important: they have an ATM right at the door. You won't be out of money at late night!
I'm not giving five stars because I prefer more old-fashioned pubs. But I strongly recommend this one.