I buy the product every 2 years (as recommended). Daily (almost) use. The necessary thorough cleaning of the blades should be done once a month as stated in the user manual (to last you 2 years). I am very satisfied with these specific blades. I did not encounter any problems. Nor did I experience any irritation on my skin. I will continue to buy the replacement blades until the shaver breaks.

Replace the heads and you have a brand new shaver. I have not tried (and do not know if there are) imitation razors, but for me, it is not worth getting an imitation. Only for the skin of your face, you want the best. I have changed my machine twice, always with the genuine ones, and every time I feel like I am using a new machine.