I use these for our fundraiser raffle tickets. I can print them out and cut them up easy and they don't rip apart so easy which is good when time comes to draw the winners.
I have been using Staples Card Stock to make personalized calendars for 13 years. I make 10+ calendars every year and give them as Christmas gifts. My first year I used photo grade paper and it was hard to write on. Normal paper isn't thick enough to print a full size photo on one side & calendar grid on the other. The image would show through and it's flimsy. Card stock is the perfect medium. It's great for photos easy to write on sturdy and affordable (unlike photo paper).
I use this card stock for making my own birthday Christmas and other special occasion greeting cards. It's a good sturdy thickness folds nicely and is suitable for various mediums my favorite being fine and ultra fine multi colored Sharpies. My family and friends always seem to get a kick out of my home made cards.
I use card stock on a regular basis for postcard mailings. It works beautifully in the printer has a professional appearance and holds up well. How do I know it holds up so well? Because the post office returns numerous cards to me as "undeliverable" and even going through three postal systems the cards still look fresh.