All the manufacturers today are trying to sell connected services, so devices are accumulating lots of features and heft. In addition, none of the manufacturers quantify the strength of vibration (what units would that be expressed in?). The lightest bands are the lowest end/value models and have the worst vibration mechanisms.

What I want is: (1) see the current time (2) get a buzz for a notification (3) alarm clock (4) ability to wear for multiple days without charging.