I have an Arca Swiss F Line 69 and recently acquired the Hasselblad 907x 50C II. I shoot mostly landscape. My background in digital are Sigma DSLRs, then Pentax 645Z, for the last two years, I have been indulging myself with film. First a Shen Hao 4x5, with a little play with my Mamiya C330. I was impressed with the modula flexibility of the Arca Swiss line. When I saw one online for a good price, I bit the bullet. I stopped using the Shen Hao as I had moved all of my large format lenses to the AS lens boards. The AS 69 came with a Hassy A-12 film back. So, I shot 120 film while waiting for the 50C II to come out. I have to say that I have been overjoyed with the combination of the AS and the 50C II.
1) Live view and focus peaking. You can see the effect of movements; really see!
2) Selecting exposure with test shots and reviewing the histogram.
3) Add the Hassy back to your bag and subtract the ground glass, film backs and dark slides, lupes, light meters, dark cloth, or release cables.
4) The electronic shutter won't stop action, but for everything else, including long exposures, it works beautifully. I haven't used the shutter sync option yet.
After shooting film primarily for two years, it feels like cheating! So much easier.
I have to say that the combo doesn't give you the wide angle of view that you would expect from a full frame. My widest lens is a Rodenstock 55mm f/5.6 Digitar. The sensor at 44x33mm only exposes the middle of the image circle. So, I use shift, and rise and fall on the rear standard, take multiple exposures, and stitch them together in LR. But, coming from the Pentax 645Z, most of my work is stitched as there were no real wide angle solutions for that system.
Before buying the system, I read many posts about how large format lenses won't work. Getting focus right is too difficult. Or the F Line won't work because the movements aren't geared. Or...