I'm using the electronic shutter of the CFV 50C with an Arca Swiss 69 and had great results. Much better than expected. Admittedly, it will not stop action, but for landscape shooting, it has worked fine.
I guess it depends what your expectations are.
Yes, for landscapes on a tripod electronic shutter works fine.
For anything else, not so fine.
Hasselblad goes to the trouble of listing what is not fine in the user guide (from X1D, but I expect the same for 907).
Please note the following limitations with Electronic Shutter:
• The camera will use the Rolling Shutter available
on the sensor which has a read-out time of approximately 300 ms. This will cause distortion of the image if the camera or subject is moving during the exposure. A tripod and a stationary subject is recommended.
• ISO will be limited to 3200.
• Full image quality is not guaranteed.
• Shutter speed range is 68 minutes to 1/10000
sec.
• Flash is disabled.
• Continuous drive is disabled.
• True Exposure is disabled.