I ordered the XF hoping for more reliable focussing with my LS240, with which focussing on my DF was very hit and miss, sometimes razor-sharp, but too often just frustratingly mis-focussed.
The XF has proved to be superbly reliable focussing the 240, just very very occasionally missing. Have it 2 weeks now.
Shutter delay using the seismograph seems to be very effective, even on the little Gitzo Traveller with Cube.
The updated firmware caused me a brief period of anxiety this morning when the XF froze for 20 minutes during the update process, but as usual with PhaseOne Tech support, all was sorted with advice within 5 minutes of logging my problem.
Removing and re-inserting both batteries (XF & IQ) solved the issue.
New countdown and level on top screen are neat.
For wide work, I am staying with Alpa and tech Sk & Rod.