:::(I found this article through a LinkedIn thread....)  I agree with  on reliability of Progress in Physics, but the same can be said for the sources of existing claims that the thing works at all, or that it's not a weird photon drive, with the photons not being properly detected.  It doesn't appear that New Scientist (the only potentially reliable source which is at all favorable) actually claims that it works, but only that Shawyer says that it works.  —