Although I have not used my replacement brush heads, I will assume they are of the same quality as the ones that came with my Nutra Sonic. I can be so thank for this entire system. It is amazing the mount dry dead skin cells on ones face let alone the dirt a wash cloth does not touch. The main point is the condition of your skin once you use this product. Change in texture, moisture and flex. Best device and it makes shaving feel twice as good.