I have one. I haven't hunted with it yet or sighted it in. I just bore sighted it yesterday, and will sight it in Saturday.
The 30mm wasn't a big deal to me. I like the power range, eye relief, and optics. This is my first quality scope, and side by side with my other scopes it just blows them away......the difference is tremendous.
I put one side by side to several other scopes at a dealers. This was during the day, so optically (bright/clear) I couldn't tell much difference between it and the 4200 or the Leupold 2.5-8. They were all great, but it wasn't a true test.... However, the points that really sold me on the Nikon was the eye relief and field of view. I wanted clear/bright optics, and felt confident that the Nikon, Leop, or Bushnell would each be fine for my hunting in this regard. The eye relief and field of view were the major factors that I had decided were important to me in my hunting and the Nikon was the best there. It fit my needs the best so I went with it.
I'll try to post again after I sight it in. I'm looking forward to that.... Hope this helps.
JCM