It has taken this long for me to let you know that the blind works very well for me! We were away for a bit, and the days were gloomy, so I have only just used it for real. It does work very well.
I can see why it got poor reviews. it does look rather 'cheap' - fabric shows a little crease, stitching poor quality; but that doesn't really bother me. Most of the time it is rolled up and barely noticeable against the off white wall. When needed, I am concentrating on sewing, not looking at the blind! So I wouldn't put it in a 'living room' of any kind, but for what I want it is perfect, and a bargain!
Happy Xmas everyone!