Got the Razors delivered this afternoon and all I can say is wow! Just tested them side by side with the Vipers and they are much clearer, brighter, and more forgiving in terms of edge to edge sight picture even though I didn't have time to dial them in. I suppose they should be at double the cost, but I still could not see enough difference in low light conditions to justify spending the extra $1,300.00 on the Swarovski EL that I sent back. Maybe true aficionados could, but I couldn't. The Vipers were a great value/bang for the buck, nothing wrong with them, but once you look thru higher end glass there is no turning back... like my wallet was afraid of. If it matters to someone who is looking to purchase a pair I have a little better than 20/20 vision. Buy with confidence.