The cardigan is finished. The sleeves turned out a bit longer than I expected but I think I can give two options in the pattern (some people like really long sleeves).
It is fluffy, yet half-brioche stitch is clearly visible. The yarn is Brushed (by Adele's Mohair), mohair-rayon-nylon blend, 50 g/110 m, needles 5.5 mm and 5 mm.