
I just bought a shake-n-wake through Amazon, and also was troubled by the hourly chime, the "major design flaw" mentioned in another review.
I discovered that pressing the "Time Set" and "Mode" button simultaneously toggles the hourly chime on and off. When the date display indicates "SU MO TU WE TH FR SA" after pressing these buttons simultaneously, the hourly chime is on. The date display will go blank after toggling the hourly chime off.
You surely will want to turn the hourly chime off. Your local church may get away with ringing its bells every hour, but your shake-n-wake must not. It is disappointing that the instructions do not mention this feature, and that customer support was not able to help the person who wrote the earlier review.

I'm an Amazon Prime Member and purchase a lot of things. This by far has been my best purchase; because it changes how your entire day goes from the moment you wake up.
I have had this alarm clock for about 2 months now. My Wife and I just had a baby recently and she sleeps beside our bed for the time being; the baby, not the wife. Before I got this Vibrating Alarm Clock I used my usual phone alarm clock to wake me up. I'm hard to wake up too. The phone would go off and wife would wake up, dogs would wake up, baby would obviously wake up and in a panic, I'm trying to shut off my phone in a dizzy haze. Sometimes hitting the snooze and repeating if it didn't happen to wake everyone up the first time, or the phone would just lock up and not go off and I would be late to work. Talk about rough mornings.
Now with the Shake-n-Wake Alarm Clock I wear it on my wrist at night. I wake up very early in the morning to run before I go to work. It vibrates and wakes me up without fail every single time without startling me. I'm not in a panic to shut it off in fear of waking everyone up. I get in my run before work and the rest of the day is splendid, not to mention the wife, and baby get to sleep a few more hours.
A few people have mentioned the hourly alarm annoyance flaw. Not a flaw, just an option. Maybe the flaw was it was left out of some of the instructions. I shut it off day one and it never comes back. Just pressing the "Time Set" and "Mode" button simultaneously toggles the hourly chime on and off. When the date display indicates "SU MO TU WE TH FR SA" after pressing these buttons simultaneously, the hourly chime is on. The date display will go blank after toggling the hourly chime off. Very easy, not worth even close to trashing this product over that.
I've also heard people complain about the arm strap. I've not had any problems with mine and wearing it 5 days a week for 2 months now and does not look to be wearing out. I imagine if it does ever break I will quickly be at the fabric store fix it or make a new one. I love this thing and after my baby moves to her nursery, I'm sure I'll still be wearing it. Even if I'm alone in bed, I'll probably still use it, because even as hard as it is to wake me up with a loud alarm clock, the Shake-n-Wake wakes me up nice and easy.
I recommend this product!
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My kid wears hearing aids, due to severe hearing loss, so she finds it hard to wake up to an alarm. I found this item on Amazon.com and have had a lot of success with it. Once we set the time and alarm time, there is a switch on or off, that my daughter uses to activate it. She puts it on her arm, and is vibrates continually until she turns it off. She has noticed that it also vibrates every hour, a few quick vibrations, then off on it's own ~ not sure how to turn that feature off, but other than that we love it. She has her independence without waking up the rest of the house to loud obnoxious alarms or one of us having to get up to wake her up.
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I'm a heavy sleeper, and it always wakes me up if I have someplace important to be. For peace of mind, I still set a back-up alarm across the room to go off 5 minutes later. To the watch's credit, the backup has never been necessary in the many months I've used the watch. When I want to wake up on the weekend, though, I tend to fumble with the buttons when it vibrates, and turn it off without actually waking up. (This coming from a guy who used to require a password-protected alarm clock to wake up for work.)
Pros: Inexpensive, easy battery replacement, clip on back so you can use it without the strap, and totally reliable for me (depends on how you sleep and wake).
Cons: Bulky, slips off the strap when awake (but not yet while sleeping, and I toss and turn a lot!), and very short backlight time.
Other notes: Another commenter already pointed this out, but the instructions that come with the watch made no mention of the hourly chime. Hold 'Reset/Time Set' and press 'Mode' to clear the 'SU M TU W TH F SA' to deactivate the chime. There's also a snooze function, which I think is activated by hitting any of the buttons except the light button.
Now that I trust that vibrations will wake me, I'm going to give the WobL 8 Alarm Vibrating Watch Silver a try, mainly because it's less bulky.
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I have to wake up early for work and I hate having a loud alarm that wakes up my girlfriend as well, so I was delighted when she bought me this.
It is a little bit on the loud side, but generally not loud enough to wake up my girlfriend who sleeps right next to me.
I typically strap the alarm to my ankle to ensure that I feel it going off (I sleep heavily). I find the strap too annoying to wear on my wrist, but it's fine on my ankle. The clip that attaches to the strap is a bit poorly designed, so it occasionally falls off of me in my sleep -maybe once per month or less. I have a backup alarm for this situation that I always turn off after the Shake-N-Wake wakes me up.
Recently it started going off every hour and I couldn't use it; the instruction guide does not explain how to turn this setting on or off. Luckily, one of the other Amazon reviewers explained how to do so: you just press Reset/Time Set and Mode simultaneously. When the hourly alarm is turned on, it will show SU M TU W TH F SA at the top as you hold these two buttons; when you deactivate it, it will show no days while you are holding the buttons. Thanks for figuring this out, other reviewer!
If the buzzing was a little less loud I'd give this a 5-star rating, but it suits my needs well, and it may the case for heavier sleepers that the louder buzzing is useful. I can imagine that it would be very useful for people who:
1) Sleep with a partner but don't want to wake up the partner
2) Are heavy sleepers who will be more likely to wake up with a physical component to their alarm
3) Want to sleep/take naps in certain situations without a loud alarm going off, like on a plane, waiting for a bus, etc.
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