I have a Darter from System 76 with Pop!_OS as my personal laptop that I code on and I absolutely love it. It runs extremely smoothly and I’ve not had any crashes with it.
I also have a Lemur from them with Ubuntu for work and it’s kinda meh. Is difficult to say what causes the issues I have. It may just be the corporate tools but I end up having hard locks that require a reboot.
If you go with them I strongly suggest Pop! The distro is built for their hardware and works really well.