Whenever the topic of the NEF rifles comes up on the net, you will see endorsements of them as above. Those who have a good nef and like it will post. those who are not happy with theirs usually don't. At least that's my opinion so take it for what it's worth.
I have personal experience with four nef rifles. One was a pretty good shooter and the other three only so so. IMO, for what we like to use the 223 for, they need to shoot better than the average nef. Two of those four rifles are 223's and with considerable messing around with loads, etc., we got them to shoot only fair. The win varmint pak ammo is pretty good though and one of those 223's shoots it as good as any handload.
The other problem that seems common to the nef rifles, especially the rimless calibers, is a tendencey for the cases to stick and fail to eject. There are remedies, etc., such as chamber polishing but if yours tends to stick on ejection, it may never be 100% sure to eject.
The ejection system is a pain when working at the bench. If you don't catch each empty it ends up behind you and working the break action at the bench is a bit ungainly too.
I threw in the towel on the nef 223 and bought a 223 Tikka T3 Lite for 430 bucks. It shoots anything I load for it at moa or better and the win varmint pak is a consistent .91 moa average even after measuring and averaging eight five shot groups with no discounted flyers /ubbthreads/images/graemlins/wink.gif
Not wanting to rain on anybody's parade, i just thought you should see the flip side of the coin.