I've been using an Apple Watch since the first unit was released. Back then, the device barely made it through a day between battery charges, wasn't waterproof, lacked an integrated GPS and had a confusing and cluttered user interface. Now, in it fourth hardware iteration and with watchOS 4, the Apple Watch Series 3 comes in cellular and non-cellular variants, has GPS, is waterproof and still has perplexing, but improving software.