I bought these so I could print some promotional postcards. The perforations really are invisible and leave a lovely smooth edge when you separate them. The finish of the paper is smooth and a little glossy, which looks great - but the ink is apt to smudge when it hasn't dried (would recommend leaving the cards for 5 mins before printing on reverse and a good 10 mins before separating) … and even slightly sweaty fingers can dislodge the ink long after the ink is dry. (I use Canon ink … no cheapo substitutes, so I don't think the ink is the problem). Anyway, I've just bought some more because, apart from minor smudging issues, they look jolly good.