Nathalie,
I've had one the last two years.
It's a wall calendar and each month has a great Cathe/Crew photo with a motivational quote. At the bottom of the page there's a few fun paragraphs that explain what's going on in the picture.
The space in each day is large enough to make notes; I write which workout(s) I did. At the top of each month there is a space to make note of weight and inches, etc. Initially I ordered one a couple years ago simply to get the 20% off deal however I love what it adds to my workout room and the motivation it gives me.
Finally, I like to tear out some of the pictures and hang them on my wall for all kinds of motivation all year long.