I have used Explode the Code with all of my kids so far; sometimes as a supplement and sometimes exclusively as our phonics curriculum. It has worked great for all of my kids and I plan to continue using it with my younger ones when they are ready.
Right now Christianbook.com (my favorite place to buy homeschool curriculum) has the 1st Edition Explode the Code books for 35% off the retail price. I’m going to stock up on some workbooks for next year. This deal is only going on for one week – it ends July 28th.