If you recognize the limitations of aluminum crampons, you will be happy with the performance of these Grivels. Just returned from Rainier, and I loved not carrying a heavy set to high camp. My route had no rock (I knew in advance there would be little to none). Turns out there was also very little hard ice, and none at much of an angle.
They performed flawlessly on this climb. The anti-balling plates did their thing - not a single curse or ice axe tap necessary. As stated by an earlier reviewer, these will now always find their way into my early season day pack as well.
One minor caution - I found the absolute limit of the adjustment range with a size 11 Koflach Arctis Expe. Boot sole length is almost 34 cm, and even with removing the quick adjust to gain the last bit of range I had to push hard and wiggle the boots into the bindings.