I love the concept but not the prices. In comparing their 13" to the Macbook Pro 13" I found the prices are about the same. The Macbook has a much better screen, a better touchpad, and the resale value will be much higher so its lifetime cost will be lower.
I don't worry so much about resale because I plan on using my computers as long as possible.
The touchpad works fine for me, and I don't notice the difference in screens (except aspect ratio). Battery life and weight are comparable.
So to me, the privacy factor and supporting Purism is well worth the price. Also the Librem probably runs native Linux better, which is a huge difference-maker for me.
Unfortunately, doing custom manufacturing for a limited market (i.e., people who will pay for privacy) means they're probably never going to be able get price parity with mass-market brands.