My experiences with The Big Cheese :
Round 1 - I headed there with a couple other Yelpers for their opening day. Granted, they had opened just after a Poutine Crawl event that I had been on the day before, so at least for me they were up against some pretty serious competition. I found that their fries were a bit undercooked, but I quite enjoyed the different toppings that they had. Initial rating was, in my mind, 3 stars.
Round 2 - I was there after a friend's birthday party. It seems they fixed their issue with the fries being undercooked, but overall the poutine toppings tasted absolutely horrible. Their peppercorn sauce tasted quite bad, and the toppings were sub-par. Keeping in mind that I was drunk (and I've been known to eat pretty much anything when it comes to late-night hungries), I was quite surprised at how bad it tasted. This rating would have been 1.
Likelihood of going back? Pretty low, especially since there are other excellent places in Calgary to get a good poutine.