Absolutely 100% authentic.. got my mrs a Tag Heuer from there, $1,000 cheaper than what I could get it for here!

They have a Titanium Powerseller rating on eBay too. Shipping was ultra fast too.

Only problem is, the website takes electronic funds transfer only (wire) from international buyers.. to use CC or Paypal, you have to order it through their eBay store, which is what I did.. cost $30 more, but I had the peace of mind of the Paypal Buyer Protection.