After many trips to Walt Disney World contemplating the idea, I finally bit the bullet and invested into the Dining with an Imagineer program which takes place during lunch at the Hollywood Brown Derby. Offered only on Mondays, Wednesdays and Fridays, the program which costs $60.99 + tax and 18% gratuity per adult (bringing the per adult total to about $75) and $34.99 (or about $45 total) per child, brings the group (maximum of eight guests) face to face with a bonafide Disney Imagineer at Walt Disney World.
Booking proved to be a bit of a challenge as, if I recall correctly, the 90 + 10 didn’t work too well. After a few days of trying, however, I was able to secure my reservation. A credit card is required at time of booking (there is a 48 hour cancellation policy), but you are not charged. Instead, you are presented a bill at the end of the event as with any dining. For booking purposes, it also appears to help if the Cast Member starts looking at The Hollywood Brown Derby moreso than for the experience itself.