hi,
use mine on a 17hmr for rabbit shooting without needing the nm800ir can see and shoot out to 100yrds without any problem, a see way beyond that. have shot in misty damp weather and it can play havoc with your sight picture, but if you then switch to a lamp and try to carry on youll find you can still shoot better with the n750.. I do have the nm800 and will try it if I feel I need more ir but fore now ,well happy with it
only thing that takes a bit to get used to is the hight above the stock that the scope fits, its not so bad if shooting from a rest but free standing it a right pain in the neck .I zeroed my in day light "evening time" and it was easy to set up and has held true till now.
I have not used gen2 so cant compare them, but gen1+ is way way way behind the n750 in picture quality.
hope this helps