You can't go wrong with FREE!!
We booked on line before we book our train tickets to Montreal as the Free Tour sells out quickly!
We did everything backwards but we still enjoy the tour after walking up Mont Royal in the morning, cut to Schwartz for lunch, by the time we met up with the tour at 1pm, we were pretty tired.
We did not expect it to be long but even our tired bodies follow our guide for the 2 hours walk.
We went through all the places mentioned on the site, our guide provided a lively tour with the history along with Hollywood gossips.
Highly recommend do this tour and well worth the tips, just don't do what I did, go to Mont Royal on a separate morning. Its an easy walk but we also walked down to the other side of town.