Yup.

So basically I wouldn't pay 200 dollars for it. Other things you can do are turn the lights on yourself and whenever you see a light do a reality check. Also, get a vibrating watch and wear it 24 hours a day (maybe not when your taking a shower though ). Make it vibrate every 30 minutes and do a reality check then. Wear it in your sleep and it works just like the nova dreamer (you might be in an earthquake or riding a bike down a bumpy hill or something).

http://www.dynamic-living.com/vibrating_watch.htm

That site is pretty sick by the way (I wanna get a voice activated remote control there). The watch is 1/4 of the price of the novadreamer but it sounds like it would work very very well as long as you could resist waking up when the vibrator (hehe) goes off.