I have no security if I'm using their device for my home network. I have pretty much devices and I prefer to have them in a lan totally controlled by me. The router from my ISP has ftp port opened, also it's exposing the admin interface of the router to the public, without allowing me to stop those services. The ISP has an account which allows him to operate that router remotely, I will definitely not use that for my home network, even if it's faster.