Bundles rarely save you that much money unless you take every kind of insurance they offer. If you dont need all the insurance, then no, you are paying more anyway.
Its like getting a Cable TV & Phone & Internet package. If all you want is internet, sure you are "saving" money, but you're taking a bunch of stuff you dont need.
People usually get the bundles because its more convenient. I would pay 10 more dollars a month if it meant I could just pay one company, but once it starts getting into like 20-100 dollars more, its worth it to just pay multiple bills.
*edit* I have 3 insurance companies since they all specialise in different types of insurance. I get a better price that way.