I played a field near Carleton Place a few years ago and it does not even compare to Sitting Duck. The equipment was very dated and the fields were very unorganized. Sitting Duck was much better.
I booked a group of 16 people at Sitting Duck for a stag party. The owner's were very accommodating and really friendly. Even though I had six people drop out of my group at the last minute they still allowed us to privately book a field to play on.
Not being forced to play with a group of strangers was great, it made the game a lot more enjoyable to play with a group of friends that were all at the same skill level.
The fields were in great shape. I particularly enjoyed the Normandy field which features hedgehogs, wooden fences, sniper towers, trenches and of course the machine gun nest. All very fun, there's nothing like sending people running when they hear the machine gun start firing.
The price was really affordable, they have a great deal for groups of ten.
I'm already planning my next trip to Sitting Duck.