I previously used the conti 4000's and converted to these for my go to race tires for the past two years. This with a latex tube is a wonderful smooth ride and extremely fast. I've had my best bike splits in IM distance and HIM distance races.
I wanted to try these tires since they had strong reviews from others and the description of the tire sounded good. I already use the Pro 4's and love them but now I really love the Power tires. The real test for them was in a criterium that I recently raced in. Lining up for the crit to begin, rain started. However, as advertised, the tires had great grip around tight corners. I've also been very pleased with them in climbing. I can't comment on wear since there's only a few hundred miles on them, but it's really helpful to have the wear indicators on the tire.
Replaced Conti 4 Seasons with these. Much quieter. Holds pavement well. About 400 miles thus far over rough pavement, country paved roads with lots of extra lose gravel on them, occasional sections (half mile to mile) of gravelcaliche. Holding up very well, no issues. No problems getting on my Zipp wheels. Like the block lettering as well. Running 23mm and possibly a bit harder than previous Vittoria tires, but they were not the same flat protection at all. Going to move up to 25mm after these wear out.
After an exhaustive internet search for a quality tire at an affordable price, I discovered the Michelin Protec Cross on Westernbikeworks.com. These tires were a bit more aggressive than ones replaced, but a great choice for pavement, dirt, and gravel. Very pleased.