Currently have the 6's. I have had them for over a year and have held up amazing. Only problem for me is they feel like bricks and were pretty hard to break in. But I cannot complain since they have lasted this long. How much difference is there in the 7's? Is it worth it to stick with Adidas or try the Propulse 3's? I tried them on today and liked the feel. I do hear they wear down fast however. Any suggestions on which one to go with?