I've never even heard of it. I think blinds can be a great decoration for your flat.

Cellular shades come in a variety of fabrics, colours and operating systems. Cellular shades have several open air pockets surrounded by the fabric of your choice. These pockets or 'cells' can provide excellent UV protection, energy efficiency and a variety of light management options from transparent to opaque. You can choose them for blinds Sonata Design in Vancouver https://sonatadesign.ca/vancouver-blinds/ .