Complex sentence: Marine Bienvenot described the song "I Love You Dark" as a "pop gem", while also claiming that the band had succeeded in their combination of melodic power pop and rock guitars, and that this was aided by Fontao's vocals.
Split into simpler sentences: Marine Bienvenot described the song "I Love You Dark" as a "pop gem". She also said that the band had succeeded in their combination of melodic power pop and rock guitars, and that this was aided by Fontao's vocals.