I have a few of the Kershaw Emerson CQC series, including this one. The wave feature functions fine and does the thumb disc. The washers are nylon/plastic, but they work fine. Upgrades to the washers have not helped when I tried phosphor bronze. Also, the screws are extremely soft and prone to damage. Personally, I find the Emerson wave is better going forward, as it deploys more reliably and there is no need to adjust my grip after deploying the blade. Look at all the demos on YouTube, and you will see how most start our holding just the base of the knife when waved to the rear. The blade steel is more than adequate for most usage and, if this sort of knife appeals to you, this one will serve you well.