Feature walkthrough, is more about giving generic steps about setting up PSCs in HA mode, using NLB solutions.
Now when it comes to using particular NLB solution, specially in production environment, we don't want to go out of supported scenario. And if we look into original KB I referred, it's clearly mentioned that officially either VMware supported or partner supported NLBs are those three suggested.
apart from those, if you have a need to use any other load balancer then you got to have a word with VMware support to find out if it's a good idea to go with it, or not.