This is a fantastic saddle! I highly recommend it.
After giving the factory saddle on my new bike the benefit of the doubt for 500+ miles, I went searching for a more comfortable saddle. After testing a few, I decided on the Cambium C17.
The Cambium C17 was comfortable right out of the box. It's firm, but has just enough flex, and adjusts well to my sit bones. I ride it in street clothes on my 18-mile, round-trip commute and on community rides <40 miles. I've ridden it on several metric and full centuries with cycling shorts. Toward the 90 mile/five hour mark, my butt starts to get a little tired, but I suspect that has more to do with the length of time sitting than the saddle itself; and, after a short break, I'm able to finish the rest of the ride in relative comfort. I've put over 2500 miles on it in the 5 months I've owned it.
The color has changed from the original slate (a grayish brown) to a much lighter brown (think standard brown dress shoes). I've read other reviews commenting on the slate color fading. I noticed that Brooks no longer carries the Cambium line of saddles in slate. I suspect this may be why.
Other than the color change, the saddle seems to be holding up remarkably well to regular use. It has weathered snow, heavy rains, and the humid summer in Washington, DC. While I park it inside at home and at work, it's been on bike camping trips and sat parked under the summer sun for extended periods of time. It still looks great.
I imagine this saddle will last a long time. However, when I need another saddle, I would definitely consider purchasing another Cambium.