About six years ago I purchased a Matias Ergo Pro with the quiet keys. After some issues with the keyboard Matias graciously sent to me another keyboard, with the regular keys. I must state that for the time that the keyboards worked, they were the most comfortable keyboards that I have ever used - and I have gone through a lot of ergonomic keyboards. But both keyboards had many issues, such as keypresses repeating indefinitely. I remember the keyboards more for the quality issues than for the comfort, to be honest.
I'm now looking to purchase another split ergonomic keyboard. Due to needing dedicated Function keys and palmrests, I am deciding between the Matias Pro, the Cloud Nine C989, the Kinesis Freestyle.
Has the quality of the Matias keyboards improved in recent years? I would absolutely love a keyboard with the comfortable Matias layout, but with higher quality. I'm not even sure that simply soldering in Cherries would help as from what I've read on forum posts the issues are with the controller, not the keys.