I also recommend it. And I'm a bit sad CopperheadOS, which was an excellent more secure alternative (they had teamed up with The Guardian Project and F-Droid [1]) contains now non-open source code of their own [2].
All of the CopperheadOS source code is still published and can be modified / redistributed. It's not Free Software anymore since that wasn't supported by the community while at the same time it was exploited by (competing) companies without giving back. The choice was either having a working business model by requiring payment for commercial use or ending CopperheadOS.