This is a great microneedling pen, but as far as I can tell, it's identical to all the off-brand microneedling pens. It has the same exact design, controls, uses the same cartridges. The only difference is this Dr Pen brand one only comes with 8 cartridges, whereas "off brands" often come with 20+ cartridges.

That being said, microneedling in general has really improved both my skin and hair. I've used it at home to significantly reduce my acne scarring, and am seeing some very impressive hair regrowth in areas that had receded.

This particular microneedling pen is very good. 6 speeds, well made, but only comes with 8 total needle cartridges. Other pens come with as many as 20, and still cost less than this one..

From my testing, essentially all the electric microneedling pens function exactly the same. I've tried quite a few now, and they are all nearly identical. The biggest difference between the different pens is the number of cartridges each comes with.

Technique:
Watch some videos online first and start slowly. Always start with a very low needle depth of 0.5mm or less to learn what you are doing first and to test it out. The general recommendation is a "checkerboard pattern" That is: vertical, horizontal, then diagonal. You stop once redness shows up, as that is generally the desired endpoint of the treatment. That's exactly how I use my pen, and it's worked so well for both my skin and hair. After just a couple treatments of 1.5mm I've already noticed a huge difference in my skin and the regrowth on my scalp.

Note:
Be careful not to treat your skin too often. No more than once a month for face, and once every 2 weeks for scalp seems like a good frequency.