x2pro works really well in my experience and really changes the FCPX landscape. This was a really crucial missing function and the guys at Marquis have taken care to get it right.
Just a few things to be aware of.
The lack of a consolidate feature in the current version means your AAF can easily turn out huge – just be conscious of the fact that all your audio source material will be copied into the AAF, which will be time-consuming and space-consuming. However, this is being addressed apparently and should make its appearance reasonably soon, I hope.
Also volume and pan are not supported but will be soon.
Finally, note that if you use a multi-track audio source, all the tracks from that source will come through even if you’ve only chosen to edit with one or two of them.
PS. I have heard that there may be issues with x2pro running out of memory but I have not experienced this.
Make sure you send your feedback in to the vendors so they can make this product as good as you want it to be. From a couple of conversations with them, they are really committed to making this work.
Simon Ubsdell
http://www.tokyo-uk.com