I have taken my dog here several times he enjoys it a lot. There are lots of small dogs that come here which is great (I usually go friday evenings). If it rains or snows, i don't recommend it unless you are prepared to have a muddy pup! Everyone is very friendly (and usually)look after their dog.
If you are a first timer bring some poop bags and water, if not im sure the other pet owners have some to spare. :)
Also if you are coming north from the 410 prepare to make a U-turn since there is an island separating the roads.