My wife saw one of these (and I'd love to see it under the Christmas tree this year). She asked if it would be something I'd like, and I immediately said "yeah!"
Now, instantly I thought of this as more than just an alarm clock in that it could help with becoming more trained with accuracy and awareness if you're suddenly waken from a deep sleep in the middle of the night.
I think if used properly, this could be a great training tool on top of a very neat alarm clock.
My thought is that I would keep the alarm clock's gun on top of my Gunvault so the general motion (minus entering the code) would be familiar.
Here's a video on what I'm talking about: