We love the Play Factory!
We come here all the time with my 3 year old and 8 month old. It's nice that they have a smaller children's area where she can crawl around safely while my son can burn off tons of energy without burning himself on the scorching park playgrounds.
This place is always clean, they keep the air down low, and if you go on Toddler Tuesdays/Thursdays (half off), it's an affordable way to keep your kids busy.
My only complaint is the lack of seating within visual range of the bigger play area, and the fact that you can't bring your own snacks. I know that they want to make money off of the crackers and cookies, but I prefer to bring my son fresh fruit or a sandwich so he doesn't come home with a sugar high.
Groupon always has great summer deals, we just purchased an unlimited month for $19, so check them for deals too.