Kodak DCS Pro Back 645M

My assistant spotted a deal online for a Mamiya 645 with this back. Any comments about it? I have Googled it and read a variety of reviews form guys that don't shoot a lot of people in the glam or fashion format, so I wanted all of your opinions. Might pick it up before my NY trip and use it on location for the Victoria's Secret thing on the 19th. Would rather know before hand :(

Thanks guys! I am not sure what the firmware issues entail, like lock ups, crashes, corruption, or just the old 'the back does not feel like working today' type of thing.

As far as the computers to sybch to, we have Macbook Pros and an AMD 4006 Ferrari logo'd laptop that performs like a champ as well.

We don't really have the chance to test it other than a few frames at the guy's house in Hollywood, but we leave for NYC Friday night.