Yes, there warranty is a great plus. They also have some great people in their customer service department. I spoke to one of them when I was trying to decide on the Vipers. At the time, I was trying out the Diamondback, but was interested in how much better the Vipers or the Razors might be. He said the Vipers were a big jump in performance over the Diamondback, but the difference between the Viper and the Razors not so much. This service rep owned Swarovski and said, of course, they were at a different level, but many might not notice such a great difference.
I warn you, however, that although the Vipers have served me well, and should serve you well, don't ever try the Swarovski Nl, unless you have the money. A few weeks ago, I did, unfortunately, and had to buy a pair and now, my trusty Vipers are now being neglected. However, I am hoping my wife will use them, especially since we just put up a bird feeder in our backyard.