Apple Watch 3 Review – What's the Deal with the Serie...
The Apple Watch Series 3 is essentially a suped up Series 2 with improved battery life and performance. Apps load faster, Siri is smarter, and the sports/activity tracking features are better.
Improved battery life over Series 2; though still not that great; Large ecosystem of apps and accessories; Much faster than the Series 2; Water resistant with plenty of sport features; Very helpful smart features including notifications; music playback; and Siri
Still requires phone to be helpful (this is not the Cellular version; Expensive; Always looks like a smartwatch; Not terribly durable