I recommend it too. I had Lunch with an Imagineer back in September, and it was excellent. We had a head of graphic design as our Imagineer. There was, let's see...
Him
Me
Another solo female
A couple with one preteen son and his friend around the same age*
Another couple.
The other woman, and one of the boys, are both interested in careers in that field - you don't get to pick your Imagineer, they just got lucky
Nobody monopolized the conversation; the Imagineer was very friendly and informative. He explained some of what he does, and mentioned a project or two for which he was responsible, and then answered a variety of questions for the next hour and a half. Oh, and we got to eat, too. One of the boys, and one of the adults, didn't like any of the menu choices - so they were each able to order from the Brown Derby childrens' menu. The 'regular' food was very good, though - although I'd have been just as happy with just the Cobb Salad.
I would do it again.
*I know there's supposed to be an age limit, but it did not matter at our lunch - both boys were very well-mannered.