I love the Asics GR5 shoes. My feet felt so much better and knees have hurt much less since I started wearing these shoes. However, I'm finding that they are lasting me only 3-4 months of about 6-8 hours a week. The soles aren't wearing out or anything, but I'm finding that they are losing the support that I like so much about them. They fit me perfectly, but after a few month, it begins to feel like when your laces aren't tight enough, all the time. I will tighten them regularly when I'm playing, but the support is just not there and I will start to notice a bit of heel soreness and a few other aches. As soon as I get a new pair, they feel great and all is well. I play a very mobile game, and play almost exclusively on clay. I do have an extra 30 pounds on me, so I know that contributes, but I hate having to buy new shoes every 3 months. Does anyone else experience this? If so, are there alternatives with a similar fit that hold up longer than these?