This is the first time I have ever tried this type of product. I was intrigued when I learned about it on a YT video and have come to appreciate it. I do believe the efficacy of the product is there, my face skin feels much smoother and I truly believe its adds to the absorption of my daily serums that I use. It seems daunting to use at first, but it really is quite simple. There is very minimal penetration that takes place, making this a great entry level Pen to start using. I would recommend starting off easy on one location of your skin to see how you tolerate it, using it before bed time is best. This Pen is very well made, seems solid and quality built. IT comes with several replacement cartridges which makes this a cost effective product over the long run.