Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Delicious low calorie breakfast option!

Luna bars are delicious and filling. They come in a variety of flavors. Plus, at 180 calories each, they shave a few calories off of the other bars of this type without sacrificing flavor or size.The texture tends to be granola/krispie crunch with a flavored thin layer of frosting. If you like a more creamy filling, these bars probably aren't for you. If you enjoy crunch and substance though, they're a great alternative to other meal replacement bars.My favorites are S'Mores and Lemon Zest flavors. I do like that Luna puts out some flavors besides pure chocolate bar or chocolate peanut butter. I've replaced my previous morning SlimFast Optima bar with a Luna bar, and the variety of delicious flavors keeps me much more satisfied than the SF bars did.