I had some less-expensive half-fold cards that I had purchased previously.  I assumed that the same card (same pictures, words and fonts) would look about the same on them both.  After all, they were both Avery products.  To test my theory, I test-printed the same thing (using the same fonts and the same picture) on both cards.  I was amazed at the difference!  The words were sharper and clearer on these cards.  However, where they really stood out was the clarity of the picture!  The picture on the other card was acceptable -- until I put them side-by-side for comparison!  On this card, the colors were more vivid, and the picture was a lot sharper.  In fact, when compared to this card-stock, the picture on the less expensive paper looked faded and washed out (something I probably would've never noticed if I hadn't seen the side-by-side comparison).  I'm still having a hard time believing that different card-stock can make such a diffence.  The difference really is that noticeable.  These more expensive half fold cards are definitely worth the extra expense, and I will buy them in the future.