I bought this watch because of their claims that the 2 vibration alarms are significantly 'attention-grabbing'. And they ARE correct. I read the reviews of other vibration alarm watches, and they mostly say that either you'd better have the strap TIGHT around your wrist to feel it, or that, despite claiming a 10 second vibration duration, the watch only gives 3 short vibrations DURING that 10 second interval. However, with this Shark Buzz watch, the vibrations lasts for 20 seconds...and there's a vibration 'burst' (as far as I can tell) every second of those 20 seconds. And the vibration are strong enough to make my wrist 'tingle'...ALMOST as if having a 'joy buzzer' applied to my wrist (...if you are old enough to remember 'joy buzzers). The con is that to create such a strong vibration, the watch had to be made large...and it 'is' in the Medium/Large category. (It's almost twice as thick as my Casio databank watch.) And if you are buying the watch to get both a beeping alarm PLUS a vibration...yet you've lost hearing in the upper frequencies of sound, you won't be able to hear the beeping alarm unless the watch is 6 inches from your ear. So, just rely on the 2 vibration alarms. (I'll report back in the future to let you know how long the battery lasts...as vibrations use a lot of battery power. And hopefully, the battery will be a type that CAN be found at a local watch shop.) Another con: I thought that my wtach came without instructions, but I found out much later that they are 'hidden' under the watch's display stand 'base' in a secret compartment. So, I had to go to Freestyle's website to download the instructions as a .PDF file. (BTW: The instructions for setting the alarm were incorrect.)  In addition, though it has so few functions in compared to, let's say a Casio Database watch (whose alarm, unfortunately, I can no longer hear)...but of the functions that it DOES have is a count-down-timer that NEITHER (a) resets itself to the original count-down-time when it's reached 00:00, and (b) does not give you the option of having the  watch automatically restart the count-down-timer after it has reached 00:00.  Those count-down 'alarm' options would be useful for, let's say, taking some medication at a regular interval throughout the day. I've read that Timex only has one watch of it's many designs that has those abilities, but I don't know about other manufacturers. [Follow-up: 7 months later...the watch face's numerals just 'half-dispapperad' for no reason. It can't be because the battery is low, or I would have gotten some indictaion in advance. And besides, half of the individual digits ARE still clearly visible. I'm changing my rating!!!]