Michael,
Im at the final stage of my 10 minute documentary. I used a mixture of RED footage, DVCPROHD, and H264 footage. I converted them all to a proxy format for smooth editing. The problems I ran into were mainly with the RED footage. It can become a pretty tedious task working around all of the bugs. Overall it was 50 / 50 good and bad. Im at the final stage trying to figure out how to export audio to pro tools, my timeline is insane so I dont know how I am going to do this properly. Just be aware that whatever your deadline is, you can be sure to push it back at least a week for completion because of the bugs. Hope this helps
Elliot