Yes, it took just a few minutes to take it out and stick it up, the concertina folds drop down and you peg them to the level you want. One thing I like very much is the look of the blind: it is in offwhite slightly marbled paper which lets in a soft light (and keeps out the sun's heat) The effect is neat and unobtrusive, especially in a light coloured window frame - do not be put off by the photo, which does it no favours.
The trouble is, I baulk at paying nearly half the cost of a permanent blind for a piece of quite flimsy folded paper with a couple of clothes pegs and a sticky strip. When it was shown on Dragon's Den, the price was way lower, and I would have bought several more if it had cost less. So I mark it down quite heavily for that reason.
Tip: when you are cutting it to size, measure it when it is closed up tight - run your pencil quickly down the ribs and then stretch it out. This gives you a (dotted) line ready to cut. OK, a bit obvious...
