Currently running in the Streak LT4, previous shoe was the TS7. Personally, I prefer the Streaks for fit, durability (this is the biggest downfall of the TS7), and weight, not to mention the cost (literally like half the price). The TS7 outsole is really grippy, but breaks down SUPER fast if you do the bulk of your running on the roads. On the track, and certainly on grass, they will last you much longer. The issue is the outsole is made up of little nubs, which are great for grip, but even for a 130 pound guy who is light on his feet, the nubs just wear down so so fast (I'm talking all rubber gone, just straight foam by 100 miles). The Streak LT4 on the other hand, I have no problem getting to 300 miles and still in usable condition (I retire them then just to be safe). Again, on the track and on grass, TS7 will be a fantastic shoe, I really do like them a lot, but don't waste too many miles in them on the roads or you will find yourself ordering a replacement pair sooner than you wanted to.