I used Kaspersky Internet Security for about 4-5 years this time I thought to move onto BD after seeing a lot of good reviews about it on the Internet so I got one license but after installing I found the installation size of BDIS was about 4 times KIS but options were only 25% as compared to KIS. If I specifically talk about firewall only KIS provides a lot of flexibility in making rules in a very user-friendly interface but BD only allow very few customizations. When I just installed it took me 15 mins it find a button to get some more advanced option but after crawling all I was disappointed.
I discussed it here. So if possible install KIS and compare your product with it..