I've had the XF for a couple days now using it with my 180 and in short love it.
The fit and finish is excellent; the RRS L-bracket I had used on my DF fits just as well on the XF. The body came with the newer firmware installed so all I was left with was updating the 180. Phase is shipping the XF with the older DF mask with no idea of when the newer one will arrive; likewise the same with the WL which I really want. The most notable item is it seems that Phase has updated their electronic shutter release outlet by adding several pins in the middle. What this means is the older electronic shutter releases no longer fit/work. Rumor has it that Phase will either come up with an adaptor for the older releases or come out with an entirely new release.
I've so far shot some landscape as well as a bridal dress fitting all with no issues.
Subjectively I think the "feel" is much better than the older DF, likewise it "feels" smaller/lighter which I know it isn't. I also fell the AF is much improved but please don't ask by how much.
In order of my importance I want the WF then the mask and finally the shutter release to be released.
These are just some random thoughts as I'm also preparing a blog on the same subject but will likely wait until after I return from shooting in Sedona next week.
It's well worth the long wait for this and did I mention I really like it?
In closing I want to thank the folks at Capture Integration especially Anthony Festa who looked over the camera before shipping it out and of course Dave Gallagher for ..... well just for being Dave Gallagher.