I liked this episode for several reasons. First of all it shows what we remember as being something wonderful is not always as wonderful as we remember. Jesse had a dose of reality on that when he took Becky and the kids to his favorite place to stay when he was touring with the Rippers. The place turned out to be a dive.
Second is that though DJ may have gone about letting Danny know about Viper she was right in defending him because Danny was judging a book by its cover. Trust in your kids decision making is important expecially when you know you've raised them well.