I ordered 3 but they turned out to be about 1/2-3/4 inches shorter than they were advertised to be.  Mind you, I was very precise in measuring the width of my windows, and I'm glad I didn't go up another full inch in width; but just hint to be very careful when measuring.  One doesn't fully pull down and so is a bit 'off; but that's OK too.  Overall I do like them (cordless) and of decent quality without paying for custom blinds.