Does having an Autoresponder really enhance your business

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or is it just something else to get in the way of things? I have been doing some research on autoresponders and I never realized there was so much to them. It sounds like they can manage a lot of opt-in people automatically, although I'm not sure how. Making money online is harder than I thought it would be. I spend so much time now spinning my wheels on all the different aspects of hosting, webpages, ECT I really don't want to spend a bunch of time and money on something that doesn't help me make money online. From what I can tell Aweber and Getresponse seem to be the two big ones, anyone ever use either one of these? Any help with this would be greatly appreciated. Roy