Bought these to send out my president's personal Christmas cards. I was pretty underwhelmed. I would have done better just buying card stock and envelopes separately because the scoring is extremely light and they did not fold well. They did the job but I wouldn't get them again.
I have a program on my computer that worked well with this, with a little tweaking. The only complaint I have is that the scoring, to show where to fold, is not deep enough, making it hard to fold and hard to get a nice straight crease.
I use these cards for every occasion. They never jam and the colors show up brightly on the paper. The only complaint I have is the score line to fold them is very difficult to find. Otherwise, these are a great product for the price.