The shaving cartridge is considerably better, the less skin irritation.
For me a cartridge holds approximately 1.5 months, so the eight cartridges form a year's supply.
For me there is no alternative. Am fully satisfied.
Changing the cartridge is easy.
Update: Have again a few cartridges ordered. Still the best deal because the original cartridges packed keep forever. Even when heat is no problem ... delivery as always everything OK!