Went there with a buddy of mine - I had been to other Fionn MacCool's locations and in general had a great experience. Was not expecting anything major from the place.
The pub is well... your regular pub, with pub fare and drinks. What else would you expect? Service was prompt and professional. Was really happy to see that they serve Ontario craft beer (HopCity's Barking Squirrel - a GTR craft actually from Brampton) - a great beer as well, recommend drinking instead of the occasionally-stale pints that are sometimes served.
The food is where I was stumped. The burger was DRY. I mean well-done crispy and feeling pieces of charcoal in my mouth. The salad that came with it was blah. Was a bit in a rush and did not bother to re-request it, although under different circumstances I would have sent it back.
I agree tho that it could have been an honest error. My buddy's steak pie was actually nice and he enjoyed it. This is why I give the place 3 stars and not less (such a bad burger deserved a 1 or 2 star rating), but the fact that it was mostly an honest mistake, the great craft beer served and the professional service earned them a bit more.