It is not OK to recommend competing products here, for obvious reasons. This is a forum for us to answer customer's questions, not a general forum.
I spend hours every day answering questions here and by email (because often, I have to do research in medical literature that sometimes even involves purchasing the article because scientific studies are not freely available nowadays any more), so we won't allow competitors advertizing their wares here, whether it is directly ("spam") or indirectly.
However - I can recommend a competing dermaroller: The Dr. Roller brand is really OK. We tested them and there is nothing at all wrong with them. We think they are totally overpriced though.
All other rollers are either not OK, or they are extremely much overpriced. Our roller has by far the best price/quality ratio though.
Again, this forum is intended for me to answer customers' questions. This way, we keep it like a "database with frequently asked questions" instead of the typical forums full of idle chatter, spam etc.
We are that strict because we want people to discuss/promote the tens of thousands of questionable skin creams and miracle lotions somewhere else. This forum is for microneedling only, and for our customers only.