I recently bought a couple express cards for my new MBP 15" for firewire 400., but found that the connection is very shoddy ! it pops out very easliy and if you just tap it, it will come out way too easy ! This is not a professional solution if you are out in the field on a $ 100,000 photo / video shoot ! Apple should get rid of the express port and put another firewire 800 or more USB ports ! Shame on Apple for this shoddy connection !