It's the lowest offset on any e61 machine I have ever seen only 10C....which is a good thing. If it were my money and I wasn't very cash rich, or simply didn't want to spend more than a certain amount, but wanted the ability to do most everything, I'd be pushing in the direction of the Bianca...well I actually did for the prototype and really it's just for my collection because it's interesting and a bit of fun, without being too taxing. I can get hands on, but I don't need to be head into an app to get my coffee, or mucking about with a tablet...just walk up and shoot. My V has a little more complexity in the setup, but once it's where you want it, the only complication is which profile shall I choose.
The S1 is a nice machine, but I think you would find the Bianca a definite move up, teriffic looks and just more fun.....quieter too and I'll bet you thought the S1 was quiet (most S1s are fairly quiet)