who have one)? ive been looking into getting a sleeptracker and i was just wondering how well it works. my main concern is the alarm, i usually hav to set very loud alarm clocks to wake me up (i would sleep through a war) and i was wondering how loud the alarm is. im looking at the new model which has the vibrating feature so if anyone can tell me about that, i would appreciate. also is it only availiable online cuz i dont hav a credit card and i cant get it online so is it available in stores?