I have nothing but good things to say about them. I picked up a Lemur March-ish, 2020. I had previously stayed away from them because a coworker had an earlier model, not sure which one, but it was just too clunky compared to my Macbook Air. The first things I noticed was I couldn't get used to the feel, Apple really has their HW quality dialed in. However,I bought it at the time Covid was entering the picture so I decided to dial in my home office, dual screens, corsair keyboard, M$ mouse. Perfect for me. When I go mobile, it's back to the Macbook Air.
Where System76 shines is their support. Hands down, it's perfect. I had a situation where the bluetooth/wifi stopped working, not sure why, we had just been evac'd so I thought maybe it just needed to be re-seated. nope. Not expecting much, I did something I don't like to do, I opened a ticket, and hands down it was probably the best support experience I've ever had. One of thier engineers called me, sat on the phone with me and walked me through patching different firmwares, upgrading kernels, we went the distance, when we couldn't get it working, they shipped me a new card.
I had another situation where the battery started going bad, same positive experience, ticket, handled.
Like I said the hardware is not Apple, but I need linux to dev, so I make it work.
I'm gonna stick with them, I feel they're on the up.