The initial offer seems to be too good to be true — a second Apple Watch (including the new 6) for $200 off. But it only requires that you add a second line to your AT&T account. If you were planning on doing that anyway, this is definitely a buy.
https://www.cnet.com/news/buy-an-apple-watch-and-get-a-second-one-for-200-off/
Abycats' Thoughts 