we also have a stroller and always request a ground floor room - I much prefer the convenience of the ground floor than dealing with the elevator (although at least they have an elevator because many of the moderates don't)
We are in Building 2 on the corner near to the food court, I think room 2101? Some people did walk past on their way to the food court or bus stop, but it really wasn't an issue, there is the path right in front of the windows, but there are also 'roads' between the buildings and most people were walking along the roads, very few people walked right next to the building.
I didn't notice any noise at all - we thought it was a brilliant location