Back when I used it the mobile app on iOS was broken, but they fixed it real quick. That was encouraging. Other than that, I mostly stopped using it because it

Back when I used it the mobile app on iOS was broken, but they fixed it real quick. That was encouraging. Other than that, I mostly stopped using it because it forces you to regularly rotate all certificates, and for my personal purposes it was too much of a hassle. I still like the project a lot and wish it would be more prominent. Nowadays everyone immediately seems to recommend Tailscale.