It's fine. people go here for decent, albeit it varied, poutine 247365. There is better in the city, but you can do much much worse.
ps: for the love of god if it's your first time eating poutine get the regular one. nothing angers me more than people wanting to try something authentic and then proceed to get it topped with guac or seventeen kinds of processed meats. Fries. Gravy. Fromage en grain. rien d'autre.
pps: avoid late at night in winter unless you want to freeze to death for something that can be had at roughly the same quality elsewhere.