This little alarm is great!When I put it my pillow case, between the pillow and mattress, it vibrates strongly enough to wake me from even deep sleep. Being able to add annoying digital trolling sounds is a bonus if you want both types of alarm.That said, you have to use it properly or it won't be of any use. If it's sitting on a nightstand or just lying on the bed somewhere, it will never wake you up. Once you put it under your pillow, however, it becomes a powerhouse. Even with earplugs I can hear the alarm, and the vibrations were so strong I had to choose a gentler shake.Battery use is my only concern. My last shaker alarm had an internal battery, while this uses AAAs. They last long enough, but it's inconvenient to not be able to just plug it in to charge. That's really my only downside, though.
Rating: [5 of 5 Stars!]