I've started rock scrambling about 2 years ago, as I live only about 15 minutes away from Red Rocks, NV, one of the best climbing spots in the United States. So far I just scramble, but am getting into more technical stuff.
  I had been using various running shoes, but wanted to upgrade.  The difference is wonderful.  The good: 1: The rubber is very sticky  2: The laces go almost to the toe, allowing a great fit on my wide feet. 3: The heel has a tread pattern that grips well when going down hill on loose gravel. 4: The toe is smooth, and allows for improved edging.
  The only downside is there isn't much padding in the forefoot. That's the trade off for the improved climbing capability. I have no trouble with it, but I only have to hike 6 to 8 miles round trip to my climbing spots.
  I have worked the shoes hard over the last few days, and they look rock solid.
All in all, I'm glad I bought these, and am having much fun on my scrambles/climbs