I said it once somewhere before, and I'll say it again. I'm taking Jolteon's claims into consideration along with a grain of salt, so while I am going to watch this, I'm waiting until every single episode is out. A series like this (especially one from Key), I feel, needs to be watched fully and close together as much as possible for a fuller effect. If it takes a couple of years to be completed, I'm willing to wait, so it'll be on my list.
Sure, I could look up the visual novel and not have to wait, but I don't want to risk being let down. (It's what I did with CLANNAD and Higurashi--watched the anime first then went for the original material.)