I love these screws. They start easy and go in easy. The spinning knob is great. Just remember to flip it back in. By comparison, I hate the Laser Sonics. They don't bite easily and they don't turn easily once they bite. Check my review there to compare. The Turbos seem to have the same thread and tooth design and they turn just as easily, but without the knob. Great for a V-thread, but the knob on the Express is super fast and I love it when I'm climbing.