I like that we have been able to keep very good logs of our network traffic for almost 3 years now without any problems or system crashes - it's really great! Some time ago there was an event when some files were missing but since then everything works fine again for us as well so no complaints here yet either from my side :) Highly recommended product if you are looking into something more efficient than your internal monitoring software solution (such as Wireshark).
We had this tool installed inside all workstations at one point because they used outdated systems which led them not being aware how their networks should look exactly by default after installation/setup process has finished successfully etc... So using such tools made sure things would be monitored properly once setup processes completed correctly even though new users could mess up stuff sometimes too :3 However having proper logfiles helps alot during troubleshooting times ;).