Editing multi-camera shoots is rarely a pleasant experience. Interfaces for most editing software are cumbersome and far from straightforward to set up. Plus there's that whole syncing thing you have to deal with before you can even start editing! If you were lucky enough to work in a professional production environment where all the cameras had timecode synchronized, then you're multicamming life is easier. But for the rest of us, we need extra tools to help us out.
FCPX re-built how multicam projects are created, put together, and edited, and all for the better. In many cases now, editors no longer have to worry about marking exact sync points to line up clips. FCPX (using what we swear must be magic) analyzes the audio waveforms of each clip and syncs them automatically! And trust us when we say it works very well, even if one or more of your sources has pretty terrible audio. We tried!