Dual BGP Sessions to Comcast

Anyone here have experience with running redundant BGP routers on a Comcast fiber Internet link? We are getting push back from the sales and front-line implementation groups while setting up a new BGP uplink to them. I have several full-feed Internet uplinks with various other ISP's running on a redundant pair of BGP routers. Shy of a few sanity checking questions during setup, no one has had any issues with having more than one BGP session active on a link. Thanks, -Mike