Instruct: Classify a review as either positive or negative.
Query: It rocks so much...

..that water boils ! Many consider Deep Purple's "In Rock" as the best examples of hard rock. If you want more and the same quality (Foreigner's "4" comes to my mind as well) consider this album. It has a perfect sound, touch of modern metal (but acoustic guitar in some songs) and melodies flow with catchy and pleasant changes. "Walk on Water" should satisfy even the most demanding collector of this kind of music.