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Approximately two thirds of the paper is taken up with a discussion of wave separation and wave intensity from the point of view of the more usual Fourier-based methods of analysing cardiovascular mechanics, frequently called the impedance method. This part of the paper is, as far as I can see, both insightful and free of errors. I found some of the discussion about wave intensity analysis thought-provoking and agree with all of their conclusions. I highly recommend the first two-thirds of this paper to anyone interested in arterial mechanics.  The last third of the paper, starting with the final sentence of the section 'Summary of Wave Separation and WIA' is, riddled with errors of interpretation and, more importantly, contains a number of false innaccuracies (or in Darwin's terms 'false  statements of fact fact')  that need to be corrected. Instead of dealing with these errors chronologically, I think that it is better to point out the fundamental errors first and then to deal with their sequelae.  
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