Monitoring windows nlb web cluster

[alphabanks]

I have a Windows 2012 NLB cluster the cluster is backing two nodes. I also have it configure for signal affinity due to the requirements for the web application. Now I would like to know how do you guys monitor your NLB clusters? I am mainly interested in making sure the traffic is divided up as evenly as possible. I know about perfmon but is there anything else that you all use. I have heard of some using a tool named HTTPMON that was in the Windows 2000 server resource kit. I have done a lot of searches and could not find it.