Staying at the DLR hotels is not cheap, the cheapest price I have seen for staying at the DLR hotels is around $160 at the PPH. But if you are there for multiple days it is good to take advantage of MM on those specific days. It's not like WDW has so many hotels and guests could take advantage of EMH at WDW. There is just the 3 DLR hotels and the guests with a MM on the 3 or more day ticket.
You get to be in the park for one extra hour and it is not really crowded as I have thought during my stay at the GCH last weekend. DL will have Main Street USA, Fantasyland and Tomorrowland opened during MM, the other lands will not be opened during MM until DL opens at the schedule time. Some rides in the lands that are opened during MM will not be opened like IASW and the DL railroad.