The best thing about this software it's that you can scan computers from anywhere in your network without having physical access or even being connected with those devices! I also like how fast my scans are when using zen map compared other softwares out there such as nessus/napititecnsis(sp?).
There isn't anything i dislike really but if possible try getting more people working together so we all have better results at once since its slow sometimes due too many scanners running simultaneously? This will speed up scanning times quite significantly though not by much because of our connection speeds still get slowed down somewhat depending where each person lives geographically speaking.(we live far away). If someone has an IP scanner they should definitely give us some credit towards their bill haha just kidding :) But seriously do yourself one favor guys don’t be scared off trying something new especially considering what benefits come along after doing said test lolz trust.