Here are the stairs with parquet effect floor and stair nosing. It took me two whole days to finish, and I’m reasonably happy with the finish. It’s not perfect, but it is a lot better than the white carpet stair covering with added cat hair (courtesy of Chico in part, pictured).
So: are you carpet or no carpet? Personally I’m very happy with the parquet floor which is not too cold on your feet whilst being easy to clean. Now that I’ve redecorated the stairs our apartment is a carpet free zone.