I own one and I am not a big fan of it. In all fairness though, mine seems to be a "pre-production" unit of some sort. That would certainly explain why some features are better on current MTC Viper Pro's, compared to mine. The turrets on mine are not that great, nor is the quality of the glass. However, I went the other day and tested a "current" Viper Pro and I have to say, the turrets are much nicer than on mine. BTW, I wrote a little "review" about it
here.
When it come to the "main" feature, which is the top turret with the gear box and ability to make your own range tapes, I am not a big fan of that either. The idea is not bad, but implementation was not done right. Making the tape is a PITA, and "even" Ted did not do it. He just wrote the distances on the tape. There is also "play" in the turret, and I hate that.
What I also realized after having owned it for a while, is the fact that you can easily slap a range tape on any turret (Scope). Sure, it is not going to look as nice, but many do it anyway. Function over form. Also, the fact that the top turret only does one rotation, so you do not get confused, is irrelevant if you have a scope that covers enough MOA or Mil for the type of shooting you are doing. In other words: If your scope has 8 MOA or 15 Mil per rotation, you are often covered out to 100 meters or so. So if you shoot 90% of the time below that, there is not reason to turn your turret more than one rotation and lose track, if you know what I mean... !?
Thanks,
Kmd