I have not read the book above, but I have read much of David Constantine's poetry translations and found them to be beautiful, so I fail to believe any work of his could be worth one star. I have to assume the one star review was done out of proportion and without due consideration that a work of literature deserves, so I am adding a 5 star review to balance it.
I am also really grateful to DC for translating Holderlin. What a wonderful job he did on that - if you can find his Holderlin translatons, get them!