In addition to all the stuff already mentioned, I simply appreciate that they make really cool toys which appeal equally to 5, 8, 10, 40, and 41 year-olds of both genders! There's nothing better in life than having fun and "bonding" with Mrs. Thermionic and our little guys, and Stern's approach to pinball is one activity which accomplishes this in our family.
Another benefit is that our sons' friends all like to hang out at our house, so we know them. As they grow into adolescence I'm hoping this will continue because it will allow us to know who they are hanging out with, which I think is essential in helping them to stand strong in the face of possible negative influences.