I received my Ultron about a week ago and used it for street photography.
I have prior experience with other Voigtlander lenses.
As expected this lens is extremely well built, it is small, sharp and contrasty.
I think the colors are over saturated, but this is manageable in post.
It shines in B&W.
For Leica users this is probably a very good and affordable lens compared to Leica lenses.
For mirrorless users like me it is a bit expensive.
I love it.
This lens is super sharp, gorgeous creamy background, incredibly well-made solid brass is gorgeous! This lens out performs my Leica Sunnicron by quite a bit. Just amazing images. Don’t think about it just buy one.