Yes, "Resin Obsession" is a legitimate business. It is a well-known online store that sells professional quality epoxy resin, colors, and molds for art and crafts. The store has received positive reviews from customers, with an average rating of 4.83 out of 5 based on 2,378 reviews. Customers have praised the quality of the products, the variety of colors and molds available, and the customer service. However, as with any online purchase, it's always a good idea to do your own research and read reviews before making a purchase.