Are these what you're looking at?

https://www.amazon.com/eXtremeRate-Ergonomic-Controller-Independent-Playstation/dp/B097D14719?th=1

At 0:18 in the video you can see the back of the buttons. They're injection molded, so are technically maybe higher quality than Battle Beaver buttons from a fabrication perspective, but Battle Beaver buttons have a curved dome on the bottom that likely interfaces better with the silicone pad that drives the contacts better.

I haven't had a chance to use ExtremeRate's buttons, but an educated guess says they'll be fine. They might be a little more rough on the silicon pad they push on, but those are cheap and replaceable.