Review on Enhanced Performance with EC90 Carbon Fiber Bike Seat Post - 3K Seatpost for MTB Road & Mountain Bikes Cycling by Tony Buckley

After 2 hard rides on very difficult terrain including rock gardens and rock jumps, the seat post is holding up well. As others have noted, adjusting the angle of the seat is a little tricky (I'm still fiddling with this) as there is a screw tightened from the top (under the seat). I was able to turn it slightly with needle nose pliers and then use the other screw you get from underneath for final tightening. It's very light and durable (so far). And it looks good.