Can someone please let me know how this works? I am still waiting on my membership number to arrive so I can sign on and explore the website. I have my passcode but no member number, so I haven't had any contact with MS yet. I understand the concept of day-by-day, but does it result in having to change rooms some nights? Do people feel this is the best way to get the room you want or do most people just book 11 months from their check-out date for thier entire reservation? I see the pros and cons to both, but just wanted more info and opinions. Thanks!