Before purchasing I had read many articles and studies about blue light blocking glasses and whether or not they offer any benefits. Knowing I was on a mission to improve the quality of my sleep, including falling asleep faster and sooner, I decided the price was not for a pair of glasses but rather for an investment in me. A great investment it has turned out to be. I wear the Smith Sleep+ about two to three hours before I plan to sleep and they certainly get me there. Heck, they work so well that I sometimes fall asleep while still wearing them. Build quality is excellent and the fit is exceptionally comfortable - even on my planet-sized cranium. Highly recommend these glasses for anyone seeking better sleep. The only challenge experienced was the amount of time it took to receive the glasses. The responsibility for that, however, I place squarely on the package delivery carrier service and not BLUblox. It took some time to leave Australia, land in Singapore and then make it to the U.S. mainland where it bounced all over the country before finally being delivered to my home. Even so, these glasses were well worth the wait! Thanks, BLUblox! I’ll be purchasing more of your products.