If they treat the restaurant as an integral part of the museum experience, that's great. I've been to too many museums where the cafeteria is farmed out and exists just as a revenue center, and the meals were awful.
I was at the Greater Des Moines Botanial Gardens a year ago, the restaurant there was surprisingly good. Considering that this is a fairly new museum, having been thoroughly revamped in 2004, the gardens there were quite diverse.