I've got an Elmar...the aperture ring definitely counts as fiddly. I'd look to another collapsible lens if I was starting over. I shoot mainly Canon RF in 35mm and the Elmar doesn't seem to be made to any higher spec/build quality than the Canon gear from the era.

The VF on the IVSB I had for a while was barely usable, but at least it didn't scratch glasses like the FED 3b I started my RF journey with. I've now got a Canon 7 and VT, and the 7 is worlds better in the VF department than the VT, which was much better than the IVSB. Neither of them are nearly as pocketable, of course.