After considerable research of vibrating alarm watches, I bought this little item on Amazon and have used it now for about a month. It has far exceeded all of my expectations. I sleep best with ear plugs (I like&nbsp;<a data-hook="product-link-linked" class="a-link-normal" href="/Rite-Aid-Foam-Ear-Plugs-50-pr/dp/B001L74BBK/ref=cm_cr_arp_d_rvw_txt?ie=UTF8">Rite Aid Foam Ear Plugs, 50 pr</a>, which I buy 50 pair at a time)and so either must wake without an alarm, or rely upon my angel wife to set her alarm and awaken me.  The first night I set four of the five alarms at one minute intervals, worried that I wouldn't feel the vibration. I needn't have worried, as a single alarm will wake me from the most profound slumber. In fact, so effective is the vibrator that I worry that the shaking will also awaken my wife, although she swears that she doesn't notice it.

I couldn't be more pleased with this little item.

Three Months Later.... An Update

After using this watch every night for the past three plus months, I am more pleased than ever. In fact, so attached am I to this watch and so much a part of my daily and nightly routine has it become that I am tempted to buy a second identical model "just in case" something should happen to the first watch in the future. In the more than 100 nights I have used it, it has never once failed to waken me, and by the same token, it has not wakened my sleeping wife a single time.