Most of my scopes are Leupolds. I was looking to buy a vx5 2-10 x42 because of it's magnification range. I saw the tract scope at a show. It had the magnification range I was looking for, plus the ballistic reticle. I decided it was just the ticket for the rainbow trajectory of my 9.3x62.
I really like it. Crisp picture, positive click adjustment. Their website has a ballistic calculator with a vast bullet library. You can print dope sheets for any magnification of your scope. If you have a question, you will have an answer within an hour. In my case even on a Saturday afternoon. I owned the scope for 7 month now.