I have killed 24 hogs this year with the help of my N550 from 25 to 170 yards, but I do use a supplemental ir illuminator. I like the scope a lot but it is far from perfect. It is a good value, I think.
My biggest complaint is that the from lens worked loose and I had to tighten it back down. The 2nd biggest complaint is that it is NOT a great daylight scope. It is as functional in day time as it is at night. I would say that at best, it is a 300 yard scope - 200 yards being more reasonable.
A buddy of mine had his malfunction under warranty and Pulsar made things right the same week with a replacement NIB.
"If you look through your scope and see your shoe, aim higher."
-- said to me by my 11 year old daughter before going out for hogs 8/13/2011