NAV vs NIS??

I have been using NAV for many years and have not had any problems (detects some things and gets rid of them!).  I keep getting notices about upgrading to NIS, and my question is, what will it provide me over the full NAV (current) that I currently run?  Is there anything to gain by going to NIS?  I have other spy software (i.e. malwarebytes) that I run in manual mode to scan on a regular basis, but do not have them running live.

 

Any thoughts/suggestions appreciated.

gumboman