There are four things that set this McDonald's apart from most others.
Most will notice that you generally have a more difficult time getting to this location than most others. This is for two reasons. One is that the parking lot of the shopping center (Windsor Square) has to be one of the worst in the QC. Two is the location within that lot. It just does not have easy access. If you are looking for easy in and out, go elsewhere.
The next issue is the staff. Totally hit and miss. Generally they are decent, but every once in a while they are just completely off the charts and you will end up waiting for what seems to be hours for a simple order of a burger and fries.
On the good side of things, they do have a pretty awesome indoor playplace. To make things even better, it is actually separated from the main dining room by a wall with a door, so screaming is kept to a minimum. You can hear them, but it is muffled. Generally I have only seen this sort of setup at nicer establishments (like Chick-Fil-A, for one).
Does it offset the downsides? Perhaps. But you really need to weight those minuses. If the kids are screaming because you are taking so long to park and get your order filled, you might not get enough bonus from that playplace to make it worthwhile.