This project is not open. A non commercial license is in direct conflict with what is the commonly accepted definition of "open" (source or hardware) [1].
Normally when hardware projects claim to be "open source", I give them a pass as they sometimes have the code or other firmware under a GPL-compatible license even when they have the hardware files under a proprietary or non-commercial license. This content is not providing any source or other files under an open/free/libre license.
This project is "open washing" and should not be considered an "open source" project.
[1] https://en.wikipedia.org/wiki/Open-source_license
> " ... Licenses which only permit non-commercial redistribution or modification of the source code for personal use only are generally not considered as open-source licenses. ... "
I mention this because it seems counter to what calling something "open source" means to most people. On the main page of the project, they say "It is strictly reserved for non-commercial applications" which... IANAL but I think the license limits commercial use of the design, but not of the device created with the design? Also NoDerivatives runs pretty counter the open source ethos IMO.