I have two of these and have found them exceptionally good in low light conditions - better than some of the more fashionable (and more expensive) names.
I have used with NV add-on and it will focus down to about 5 yards - just a bit awkward having to focus with the front PA close up, but it has good depth of field (with NV) from c20 yards+.
I was so impressed I tried one of the 3-9x50 - but it wasn't quite as good in low light.