According to a Senior Mac Expert at Apple, although the Watch uses Bluetooth low energy (aka BLE, aka Bluetooth Smart) which theoretically has a range of a few hundred feet, in real-world usage one should only expect 30–40 feet (9–12 meters).
Do you have a gift card that you want to associate with your Apple ID? You can do this by first logging into appleid.apple.com. Once logged in, you can scroll down to the Payment & Shipping section. You can then click “Edit Payment Information…” and add or change your card.
Be careful, if you’re using a Visa/AmEx/Mastercard/etc. gift card, that you don’t throw the card away. When you try to use those funds later, for example on Apple.com, you will be asked for the security code on the card. If you don’t have the card anymore, those funds may be permanently inaccessible outside of some uncertain intervention by the seller or issuer of the card.
Regarding Apple’s One to One service, what’s the difference between Group Training and Open Training?
In Open Training, you are working on whatever project you wish with a trainer on an individual basis; in Group Training , there will be a workshop or presentation on a specified topic such iOS, iMovie, Photos, etc.