It's actually a little weird. When you wake up with a normal alarm clock there's usually a sharp delineation between asleep and awake. With the WakeMate since it gets you during near-awakeness you feel as though you've already been waking up for several minutes when your phone suddenly stated chiming.
It's not like in sleeping pill commercials where the woman wakes up and gives a happy stretch, instead it's just that your brain is already booted up, there's isn't a wait time for it to start functioning.
If you didn't have enough hours of sleep it won't magically make you fully refreshed. However, we can often survive on less hours of sleep than we think if only we wake up at the right time. And I know that for me if I wake up at the wrong moment it can ruin my day (I remain tired all day even if I've had adequate hours)--this is something WakeMate definitely seems to help with.
Edit: I've found it to be a tad overly tight but I'm a pretty big guy. After a couple of uncomfortable nights I inverted the band which helped a lot and now it's just fine. The device is attached to a pocket on the "inside" of the band, when you invert it the pocket is now on the outside of the band, and the device itself no longer constricts the circumference. It's still just as tightly couples to my arm movements though so I don't believe accuracy has been affected.
