Ask HN: Is the Blackphone worth the price for its security features?

My old clam-shell phone finally gave up the ghost after 10 years. I'm interested in buying the Blackphone (https://store.blackphone.ch/) for it's security features, but am wondering if it is secure at all in reality. Marketing is one thing, crypto is everything, so to speak. Any thoughts or good reviews of the product out there? Thanks.