Personal opinion on the "Soft" nibs:
As far as how the "soft" nibs feel for writing -- they are somewhat mushy and I would describe them not as springy but rather as "bendy". They require a very light hand to write at their finest. The ink flow is higher than from their non-soft counterparts, and the feeling is less that of a flexible vintage nib or something like FPR Ultraflex and more like how I imagine titanium nibs the way people describe them as paintbrushes. Trying the soft nibs in person made me realize that I don't like them when compared to the regular/hard counterparts. If one is looking for a flex nib, these are not it. It's not easy to do controlled variable nib writing with these due to poor snap-back, and the line variation is not great anyway. These soft nibs are not meant to be flexed significantly if at all. You can see I tried and failed to do a terrible version of flex writing with the soft nibs and gave up after a word or two.
Personal preferences aside, I disagree, the snapback on the soft nibs is quite comparable to a semiflex vintage nib. Flex nib require quite a lot of practice to learn how to use properly, they're not supposed to be fingertip mashed down, rather your entire hand should supply the pressure. This is why it feels hard to control, it's a firmer sort of flex intended to follow along with the angles and loops of copperplate and spencerian. If you just do roundhand or vertical cursive, I could totally see why it wouldn't work well and the FPR ultraflex is the king.
They're not really intended to be flex nibs either, but the pilot SF at least can easily lay down some impressive shades.
A Ti nib is closer to an 18k nib, and the FPR ultraflex has the worst snapback of anything currently on the market (though it does flex well)
All that said, if you don't like them, you're not wrong. You can't be, it's completely subjective!
Edited by Honeybadgers, 09 August 2019 - 23:57.