As any one paired and uses successfully an iWatch 3 (not cellular) with an iPhone 5s ?

Hello All,

I went to my nearest AppleStore (south of France) figuring to buy an Apple iWatch 3 (not cellular) to pair with an iPhone 5s.

They told me that it doesn't work.

Despite that on the Apple website they say it does. A told them that, and they say to me that many personnes tested it, and could not succeed.

I don't understand why Apple say it works.

As any one paired and uses successfully an iWatch 3 (not cellular) with an iPhone 5s ?

Tanks for the answer.