We absolutely love Grapevine Studies! Although we are not currently using the studies, we most certainly will be again in the future. I used them with PacMan when he was in 1st grade, and we used them as a family also. I am waiting until Ladybug is a tad bit older and then we will begin using them again for our homeschool!
I wanted to share now since they are having a HUGE 50% off sale now through Feb 8, 2013! You can see all of the details here!