I loved the first steam controller…but it wasn’t robust.
My paddle buttons broke within a few hundred hours, I 3d printed a new one and good to go. Then the shoulder buttons stopped working quite quickly, which I fixed. Then the thumbsticks stopped. Then it was something else. Then something else. After about 500 hours of gaming I had given up.

I thought it was me being too harsh. Bought another one but that -relatively- quickly stopped working. Same issues, paddles, buttons etc etc.

Got myself a second hand DS4 for £10 and carried on. 1200ish hours of Rocket League later and one shoulder button started to play up. I opened it up, put a mechanical keyboard o ring over the silicone membrane thing under the buttons and carried on playing for thousands more hours. Every now and again I would open it up to clean it etc but that’s all that happened.
All in all I put nearly 4000 hours in to RL, but only about 900 of them with the steam controller. And they constantly broke. The rest of those hours were with a second hand DS4, with a few O rings to help along the way.

But I did love those steam controllers. They just felt right in the hand. I just hope the second one is a bit more robust than the first.