""Spiritual Healing" was probably the first really prog-related effort by Death, and, while it is not a masterpiece compared to Death's last four albums, it is way more interesting than many other death metal releases at the time. Paul Masvidal of Cynic has described this album as being in a more progressive direction than its predecessors, and, sure enough, there are plenty of progressive elements, such as time and tempo changes and complex song structures. There is also plenty of Schuldiner-style riffage which combines brutality and speed with melody and catchiness."
"While less progressive and more of a straight death metal album than any of Death's subsequent albums, "Leptrosy" is nevertheless miles many other death metal releases at the time. There is plenty of unmistakably Chuck Schuldiner riffage on this album, and there are a few progressive elements to be found on this album, such as interesting time and tempo changes, "Pull the Plug" being the most interesting song on the album."
"Another testimony to the fact that Death were superior to most of their contemporary death metal colleagues, 'Sound of Perseverance' is yet another prog death metal masterpiece, although not as well produced soundwise as 'Symbolic' or 'Individual Thought Patterns'."