Level efficiency, nothing to say shaving is more effective than with conventional blades Gillette fusion power. The blade glides smoothly and one or two passes is sufficient. For sustainability, it is satisfactory but excel: my first blade being already spent 25% after passing over the beard, full chest and armpits. That said, with 11 blades, I have enough to last long, and combined with a comfortable shave, it gives the best price / quality ratio and shaving surface / price.
Final Note: The manufacturer advises the Body Gillette razor body surfaces other than the beard, but it fulfills its purpose very well and saves me from having to use two razors and two different types of blades.
