Hackwood, give it a shot! I'm beginning to love this method. It really opens up more brew days for me, since i can split it up and it's very difficult for me to be able to nail down 8+ hrs to brew. Overnight mashing is great for anyone who finds themself in a restricted schedule. Great beer can still be crafted despite the traditional methods. So much is said about LETTING the beer work for you, but not too often can we HELP the beer work with us.
On a side note, after several batches, I have yet to brew a sour batch.