It takes some time to get comfortable with the new interface, and I found the experience disorienting at first. You cannot expect to open any existing project file. FCP X is not backward compatible with projects created in Final Cut Studio because of the underlying architecture changes in the new version that allow for all the new capabilities. Don't expect to use many of your time-honored keyboard commands, either. The essentials are still there, but the function key commands have been remapped.

Some cameras that are popular with video pros might have minor issues. For example, in my tests, the software did not support importing media directly from Sony's EX1, so media transfer had to first go through Sony's XDCam Transfer Tool, and then get imported as files, much the same way it was handled previously.

Likewise, ingest from Arri's Alexa is limited, as metadata from that camera is handled as an FCP 7-compatible XML sidecar file. This version of Final Cut Pro currently does not support any XML formats. And that will give broadcasting professionals some pause.

To handle scratch disk allocation, you no longer define a location based on a system level setting; you now define disk locations and move data directly when an Event is created, or from within the Event Library.

Click on little sprocket/gear icon at the bottom of the Event window and select the Group Events by Disk command. Then you can move or allocate media to any attached volume listed.