I have purchased lots of products from isntree's onion newpair collection and they are all amazing. I love everything about this product the way it allows other products to penetrate deeper is really a game changer. It does have a tingling effect but as long as you are not actively rubbing your skin you can't feel it at all. To me the tingling proves how well it is working and my skin has been almost completely clear since I started using this product. Not to mention the pump is great as well as the twist lid to keep it secure for traveling.