Ah, this'll be one of those threads that started elsewhere (Leica Place) but ended up at Cameraderie with the merger of other sites. That's ok though, Voigts are available on plenty of other systems and I love 'em so hope this image thread keeps going. Here's one of mine (my 1,000th post!).
I use one Voigtlander. The 75 mm 2.5 Color Heliar. I adapted it for use on my A7Rll.
I've been very happy with the combination. Have to say the combination is not exactly "Compact" due mainly to the weight of the camera.
I've got a couple of them, very different beasts indeed: the 40mm f/2 Ultron for Nikon F, the 35mm f/1.4 Nokton and the 21mm f/4 Color-Skopar for Leica M. The Nokton is a capricious lens - very sharp and controlled at f/5.6, funky and a bit unpredicatable at f/1.4, with crazy bokeh. The Ultron is a very nice pancake - sharp, with very pleasant and even rendering. I enjoy using both these lenses, but my favourite is the tiny 21mm pancake: bold, punchy images, decently sharp wide open, flares like mad, but this can be used for dramatic effects. I also like the fact that it's a reasonably well correct lens for distortion and aberrations. Even so, I also like it for b&w:
I own two for M mount. The 35/1.4 Nokton SC and the 50mm f/1.5 Nokton ASPH. The 50 is outstanding, with very smooth bokeh and sharp from corner-to-corner from f/2.8 and only suffering a bit in the corners wide-open. It has no noticeable focus shift either making it very easy to work with.
The 35 is a different beast, behaving much like a vintage lens with noticeable focus shift and a general lack of sharpness at wide apertures in the corners, but nice and sharp in the center. Bokeh as others note can be quite nervous, but can also be beautiful depending on what it is that's being blurred.
Neither is my only lens of that focal length, with the 35 as a lightweight and classical alternative to the ultra-sharp and modern Zeiss 35mm f/1.4 Distagon ZM and the 50 an alternative to my very classical and gorgeous Leica 50mm f/1.4 Summilux pre-ASPH.