I like that it is open source and that it has a very active community. It is also very customizable and can be used to protect small networks or to protect large networks. It is very easy to set up and to use. The only thing I don't like is that it can take a while to get used to the interface. The support is also not very active and sometimes you have to wait for a long time for an answer. I use it to protect my home network and my network at the office. It has been very effective in protecting my home network and my network at the office.