I’ve had this book for some time and find his settings a bit much for use as Responsorial Psalms, having no cantors, but they are great songs nonetheless and suitable for use in other situations. Of course, if you have the resources these are wonderful for cantors/singers to use as Responsorial Psalms, its just that I look at them as great music.
When you hear his songs you simply forget they are psalm settings.
I have the original volume, which is now called Volume One in its updated second edition, which you can purchase here. I have purchased Volume Two and it is on the way.
One difficulty I have is that the text for Australia from the Grail is copyright, and the public domain lyrics on the internet are just wrong for us. To get around that I will provide links to Kate Keefe‘s site where she has the lyrics, but obviously her music is different to Paul Mason’s. You may find yourself using her settings, as I suspect Kate’s are actually better as simple responses, but Paul’s settings are just something else.