The Speedcross 5 are a great pair of trail running, scrambling, and hiking shoes. They have incredible teeth on the sole but are still relatively lightweight and don't give your feet that "weighed down" feeling that some heavier shoes do. I'm not much of a trail runner, but these have been put to good use while hiking. They handle themselves well while scrambling over wet rocks to get over streams, on snow patches, on regular trails, and on steeper scrambles with loose rocks. Very happy.
SIZING: Watch it here. I normally wear a size 6 women's in most sneakers, hiking boots, etc. But these run big. I was contemplating a size 5 because they just seem so long but, in the end, decided a size 5.5 was best for comfort.