One question is if any incoming ports are blocked. I'd strongly prefer if *no* ports are blocked as I run my own smtp/dns etc. I understand that there is no static IP but with DDNS I can still run a DNS at home, right?
Second, what is the grace period in case I cancel the Gbps service? I'd want a month or so to switch over and in case things don't work out I'd rather not pay any cancellation fees or additional charges.