We had a group of 12, and I would say this is about the maximum amount that could comfortably stay. We were really impressed with the property, as this feels very newly renovated. This is a great spot for those with kids, as there are plenty of indoor activities provided, along with a good amount of yard space and blacktop for basketball, bikes, skateboards, etc.
The dining area does have trouble seating that many people, so you do need to spill into the attached living room, but it wasn't a problem for us. Bonus points for the extra refrigerator.
Communication was great with the host. Checking in was easy, they responded immediately when we needed help logging into the YouTube TV, and they communicated with us about extra time at check out due to the cleaners running later than normal. We didn't get a chance to take advantage of a few extra hours, but it was appreciated nonetheless.
We didn't venture out into the town much, but there was a fall festival at the park down the street and larger towns are close by. For those playing at Grand Park, this would be a great spot - it's probably not even 10 minutes away and you're not running coming in from that side of the park.