Light Weight is king
After starting to climb alpine routes in winter with the Power Cam's this season there is no turning back. The convincing factor for me was the weight. Its just so nice to have a lighter rack on the approach but more important less weight on the harness. Using the power cam's increase the safety margin for me as I'm less reluctant to take a few doubles, some thing I rarely did when I was using heavier cams.
The price is also attractive along with easy handling with gloves, some thing I was not so sure of before taking them out an using them in winter.