Mine also same.. 3 to 4 weeks.. Might be cancelling my order though. Using it with my Apple Watch Gen 0, and there will be no difference for me even if I get the Nike+ watch.
Personally I prefer to run with my phone, after the run can still play with the phone. Battery life of the phone is better too. The battery life of the Apple watch with the Nike+ app on is about 5 hours, and for most people, it won't last through a full marathon. I'm thinking the gen 0 and 1 watch might even last longer due to the lack of GPS.
As for the waterproof function, as long as you are not bringing it for a swim, the gen 0 and gen 1 works fine. They can easily survive raining conditions.
The watch face is something that is nice, but not useful for smart watches. You get too little information. And without using the face, the strap looks weird! Especially the black and volt color.
That said, I wonder why I'm still resisting on cancelling my orders.....