I bought the Philips Wakeup Light a few months ago, as I pretty much hate the fact that I have to wakeup and go to work when it's dark out in the winter...
My wife was pretty skeptical at first, but we both swear by it now. It's a much more subtle way to wake up and I no longer have the OMG I'M BLIND moment when I go to brush my teeth.
The biggest downside is that on occasion I wake up when it's just starting to turn on (maybe 20-25 minutes prior to my alarm time) and it's pretty hard to get back to sleep after, though I try