My Tag Heuer keeps better time than any Rolex or Omega I've ever owned. Its a rock.
I don't dive with it, because it would sit right under my compass, and I dive dry.
As to sending it to NY, that's just not necessary unless your local Tag dealer is unable for some reason to change a batt and pressure test it.
I've had mine for about 8 years. Love it. Wear it every single day, beat it to death, and its just a rock. I'm not a watch geek or a gadget guy, but I can say without reservation I have never regretted this purchase for one perfectly timed second.
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Ken