Watch doesn't open apple pay consistently.
When I put my watch on, I enter my passcode. From then on it's supposed to be ready to do Apple Pay when I press the side bar twice. That seems to work fine until I really need it to work, like at the register, then invariably when I press the side bar twice I get my friends selector instead of apple pay and you're screwed. Nothing I do from that point gets it to show up and I have to go to my phone. Of course my phone shows Apple Pay every time I pull it out of my pocket, except when I'm at the register needing it. Then it won't show up either and I wind up using plastic. Very embarrassing for me and doesn't look good for Apple Pay either. I hope this will be fixed with the other improvements coming this fall 2016.
iPad 2, iOS 5.0.1