Doing pretty well with Logitechs MX Ergo which also looks more polished than this open source alternative.
I am fine with paying for closed source products if they are good and can be used without a hassle.
Also it's good for people with big hands.
The only downside is the rubber downside of it. It got unstuck so I had to glue it back onto the metal part. They really didn't think much about that.