I liked Waitress, but to me it's not even close. DEH is vastly superior in every way. If you can get tickets to see it on tour, grab them and consider yourself extremely lucky. And don't listen to the small minority of haters here. Just look at the objective evidence (well, semi-objective) Best Musical, Best Book, Best Score, has sold out virtually every seat since it's opened at very high ticket prices. And that last fact is based on word of mouth, so that should tell you a lot.
CZJ at opening night party for A Little Night Music, Dec 13, 2009.