I have one, and I love it. I'm a big supporter of NEF. They are an American company that makes an affordable product. That being said, I have read some reports about people buying what could best be described as a lemon. This means the groups may be a few inches no matter what you do. I'm not sure why, it's just what I've read. My experience is a good one, and I don't even have that good of a scope -- just a Simmons 8 point 3-9x.
i've got the survivor model in .223. It has a great look and feel. The trigger was pretty heavy, but I did the 2 minute, free trigger job, and I'm waiting to see if that helps.
The trigger job is a way to debur some of the interior parts without dissassembly.
Cock the hammer. Put your right thumb behind it, and your left index finger in front of it. Push hard with your thumb forward, and pull the trigger (and duh, make sure it's unloaded.[

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Anyway, use your left index finger to stop the hammer, thus preventing a dry fire. Do this a few times, and the friction will slightly grind down some of the contact points, making smoother edges and a smoother fire. (In theory. I've read about a lot of guys doing this with success. I'm still waiting to see if it helped mine.)