I have one and it works great. Its the same rest as the 4000 except the micro tune, which means nothing because they are both very simple to adjust with or with out the micro tune.
I also have two muzzy zero effects, which I prefer over the quick tune and the price is now down about equal to the Naps. Not to down play the quick tune, it has not done me wrong (just make sure your cable clamp screw stays tight), but I preffer the muzzy. By the way, I just picked up my second zero effect for 45 bucks on ebay, which is half what I payed for the first one.
Dont get me wrong, nothing wrong with the Nap, great reast.