The reservations definitely open up earlier than 6am. We are going for 5 days over New Years, staying at FS so did not get the +10 advantage. First day for checking reservations I dutifully opened the app at 6am and there were some times available but of course the most popular ADRs were gone. Next morning, ten minutes earlier, reservations were available. Next morning 10 minutes earlier, same thing. Yes I was trying to get my sleep, lol. Last day was at 5:30am and reservations were open, still dont know for sure how early they open up, but 6am is a mistake. All times were EST. Should say I am saying all restaurants, not Space in particular.