First of all, it should be noted that this specific roller, like all others, is simply a tool and should be treated as such. This means that if the procedure is not followed correctly, it is not the tool's fault but rather the way it is used.
As for this specific one now.
I bought this with a needle size of 1.5mm to treat some small scars on my face. It should be noted that my skin is quite resilient, which is why I chose this needle size. For someone with sensitive skin, this size is definitely not suitable.
It is quite lightweight but well-made, made of plastic except for the head and needles. It comes in its own cylindrical case with an extra cap for the head. This is very practical for storage and sterilization.
I have already used it twice and the improvement is noticeable. With two more sessions, I believe the scars will completely disappear. However, I must reiterate that they are small, meaning they can be covered with a good makeup.
Also, some expression lines I had have significantly diminished, and my skin feels noticeably firmer and rejuvenated.
Finally, even my eyebrows (which are very thin with weak hair) look better.
I do not recommend using it in the eye area.
Now, regarding the usage method.
It needs a ten-minute sterilization in alcohol of at least 80 degrees before use, and after use, soak it for 10 minutes in warm water with dish soap and sterilize it again in alcohol. It is somewhat painful, but this depends on both the needle size and each person's pain tolerance. For me, it was tolerable. In case it is not tolerable, I would recommend a lidocaine ointment. Also, before use, swipe your face with cotton soaked in alcohol for better sterilization. If needed, apply the lidocaine cream after the alcohol.
Personally, since I was interested in skin healing and regeneration, immediately after use, I applied tea tree cream and once it absorbed, coconut oil.
After completing the entire process, I will get another one with smaller needle size for exfoliation.
In conclusion, I am completely satisfied and highly recommend it, as long as it is used correctly and the appropriate size is chosen according to the purpose.