In my 2007 dining review, I did a review of MBYBBQ. My review is pretty detailed so I'll let it speak for itself.
Some things to consider when considering the credit worthiness of the event...just keep in mind that tips are not necessary for the event, so if you were trying to base the worthiness of credits on cost, add a typical tip amount to the actual cost to get the price spent for credit value.
This type of question is pretty subjective, so if you have any other specific questions, I'd be happy to answer. Otherwise, hope the review helps.