Having tried the other replacement blades which were a complete disappointment (they didn't cut well, caused cuts, pulled hairs), I believe this is the closest to the blade that originally came with the device. Even the operating noise is different. It also works for the old models.

Excellent machine, the heads need to be changed every 3 months in my opinion, but it depends on usage. If used only for the face, they last longer.

Very good blades as they cut very well without irritating the skin and leaving it smooth and soft. After a while, you will notice that they need to be replaced, however, they last long and combined with their very good price, you will have no problem replacing them. Also, with these blades, the machine becomes much quieter compared to the older Philips blades. 5/5 for me, I highly recommend!!

They are a bit better than the regular ones.
Something I didn't know is that they also fit the regular models, so there is no need to change the entire shaver, they fit perfectly even on models that had the regular heads

very good replacement products, the manufacturer mentioned that each piece lasts up to 4 months with daily shaving, I can say with certainty that they last more months with proper use

When using genuine parts or the machine works like a clock.... The imitation parts can ruin your machine

In absolutely no case is it worth 20 or 25 euros that some people ask for. It is clearly profiteering and exploitation.
I'm not saying they are very good for what they do, regardless of saying to replace them every 4 months.
They should cost 10 euros, that is 5 each. I can't understand this pricing policy.
As for the advertisement with the "permanent discount", either it is false, or it does not apply in Greece. On the green card, if you scan the code, it shows what I attach

Always very advanced Philips in hair care products :-)
They cut very well and last a long time before needing to be replaced.
I should mention that we have soft beards in the family, so I don't have an opinion on hard beards

Extremely satisfied both with the usage and the duration (comfortably lasts for 4 months with everyday use)

I have been using it for 2 years. Very good quality. And it lasts for many months. Of course, I have a few hairs, so I can't compare it to heavy use.