Admittedly some have been having difficulties withe the online system. But I made my ADRs at 3 AM Monday and it worked like a charm - not slow or balky at all - and I got everything I wanted at the times I wanted, even some hard to get places. And it does give you a four hour head start over those who wait to call at 7. I would definitely give it a try - I think it has worked well for most people.