Im very pleased with this product. Great quality for the price. It is impossible to find  one of these rings of this quality for less than ten bucks. I took a chance and I am so glad I did. I haven't had to use it but Im sure the customer service is great my ring came with a little card with information about the ring and stating if there are any issues including sizing to contact by email and included an email address, also states lifetime replacement warranty all of which I love. I have worn this ring and it fits great, I am constantly putting on and removing gloves and had no issues with it coming off. And its comfortable. I also have really sensitive skin and a lot of things cause me to break out but not this ring. I am very very happy with this product.