I mentioned this in another post, but I think the point needs to be driven home. ALL dermarollers are essentially made in CHINA. Even Owndoc posted something recently and ADMITTED that their rollers are sourced from China as well. I remember the Sarah lady posting a while back talking very negatively about China rollers, and now she openly says that hers are made there as well. Point is, be skeptical and don't buy everything you hear online.
As far as the micro-tearing issue goes, that seems like something the marketing department of dermapen came up with to differentiate their products from the rollers. Don't get me started on Banish Kit. And now it seems like Rodan and Fields, the people who make Proactiv, are trying to get into the dermaroller game now too!!! Seems like there's a lot of money to be made in home treatments for acne scars. The are also marketing extremely AGGRESSIVELY on youtube as well with a lot of their sales people spamming countless youtube videos.
And Sarah at owndoc is a very skilled marketer. First she was against the automated devices like dermapen, and wrote a lengthy article bashing it. Now she sells her own machine. That's not to knock her device, it's just to show that she is a marketer first and foremost. She was against it before she was for it. Kinda like how her story keeps changing about where and how she sources her products. Again, not knocking the products, just exposing her for what she is.
Just buy a decent priced, good quality roller, and forget the hype!