I keep vacillating on my opinions about this lens! On one hand, it's fast, compact and very well built. It renders in a classic and slightly dreamy way wide open, and it's produced some of my favourite images including environmental portraits.
On the other, the dreaminess wide open tends to glowy haze, the bokeh can be jittery, and I prefer the Zeiss knurled bump focus ring.
I just spent the weekend with the CV 35/1.4 with my M9, along with the Elmarit 28 and Summicron 50, and the Voigtlander is just so much fun in low light.