Since posting this I have personally used DIsney Dining Buddy and I LOVE it. It has gotten me a Be Our Guest dinner reservation and Akershaus Breakfast reservation < 2 that i wasn't able to get at my 180 day mark: now I was able to get Cinderella's Royal Table at my 180 day mark without Disney Dining Buddy but I was logged on at 6am. Disney Dining buddy DOES NOT automatically sign you for the reservation. It sends you a text message that one is available and you click the link it sends you that directs you directly to the page and you book it yourself. If it's really important to you, I would suggest setting an alarm and getting up for it! I booked everything back in March and wasn't able to get the exact day at Cinderella's Royal Table that I really wanted, so I set up a dining buddy request for the day I wanted and I still haven't gotten any alerts that on that one, so Dining Buddy definitely does not guarantee the reservation- it simply lets you know if one is available and saves you the hassle of having to check the website constantly.