I don't have a lot of use for the Apple watch myself, but it's been great for my wife. She, like a lot of women, regularly wears clothing without pockets that can hold her phone, and puts her phone in her purse.

Having your phone in your purse radically changes the value of the watch. She used to often miss notifications, and sometimes calls, that she couldn't hear or feel. And even if she did notice them, digging your phone out of your purse is considerably less convenient than taking it out of your pocket.