We've done them- by request.
They are not all that popular- maybe not as comfortable?
I'm not sure- maybe others have tried them!

BTW- WELCOME choclo!!

No clue about the comfort (I cannot even wear my wedding ring, never mind something else), but I thought the main idea about the Euro Shank was to avoid rotation - which of course it does admirably well.

Welcome!

I admit I have tried them on and they bug me.  But I also don't care for comfort fit rings either so I seem to be more picky about the style of fit.

I have a Euro-style shank on a ring that was my mother's. I don't wear the ring anymore; however, back in the "old days" when I used to wear it, I found the ring to be extremely comfortable. The ring features one multi-carat colored stone, along with some small diamond side stones. When worn, the somewhat thin white gold band does not spin on my finger at all. If this style were more readily available; I'd probably choose it over "regular" shanks.

Welcome Maspa! now, what exactly is a euro shank? 

I've had one before.  I have to say mine bothered me just a little. It was comfortable enough, but I always "noticed" the feel of having it on.  For me, I'd rather have the regular kind, but if spinning is a major issue, it would be great for that reason. 

I usually do not have much of an issue with my rings spinning either, but the design I asked David to make needed some balance.  I would definitely recommend trying on a few rings with a euro shanks if it is possible to find them, some are more 'harsh' (more squared than rounded) than others and can feel a little uncomfortable if they aren't the right contour of your finger.