Yes and no.

Vixen itself has been around since the '70s. Huge following and respect within astronomy, but mostly outside of the US. Their astro products have been around in the states for quite some time and they're trusted.

The scopes have been around for well over a decade, but mainly in Europe. So far, the VII and VII lines have been pretty popular there. Obviously the hunting community there is a little different, but we all know the caliber of optics they have available.

Some publications:
Here's a full review of the Vixen 2.5-10x50 from a magazine in February 2012: Vixen 2.5-10x50 Review

The Vixen 1-6x24 was put up against some alpha glass in a review in another European publication, where it finished in the top three with the Leica 1-6x24 and Swarovski Z6i 1-6x24. The lineup in that test also included dangerous game scopes from Bushnell, Docter, Kahles, Leupold, Meopta, Nikon, Steiner, Trijicon, and Zeiss, and the Vixen came out ahead of all of them. So I think it's pretty safe to assume that it's quality and value is on the same level as the commonly accepted alpha brands, at least the 1-6x24.

Here's the full article and specs chart for the scopes tested, but they are in German.

The US distributor for Vixen only started importing rifle scopes in early 2013. We got involved with them on recommendations from some guys we know in birding and astronomy, and when we learned what they were trying to do with the rifle scopes, we got some product in. If it means anything, I'm sticking with them because I see a lot of potential.

The scope end of the company is literally in its infancy in the US, but I'm pretty confident that they'll quickly find an audience.