I got the groupon and hold my 12 year old son's birthday party with friends. It was great!!
Pro: 1) you can bring your own food! (I am so sick of all the kids' party place only can order their own cheese pizza and cake.... so this is VERY important for me!)
2) they are flexible with reserve time and how long to use up your rounds
3) employees are supportive. We are picnicking and the boy brought me a table cloth right away!
4) kids love it
5) restroom is very clean
Con: 1) since their time slot is quite flexible, so you basically wait in line for the fields... not really "reserved"
2) it's a little far location
3) kids younger than 9 basically are running around..... not much for them