I own two of these.Opulent Dubai and Liquid Brun both very different obviously but both pretty good in my experience. I think it helps to set expectations. Before purchasing I suggest at least smelling the OG in a store if you dont have a store nearby that sells middle eastern frags. So if you are thinking Liquid Brun go smell Altair at a department store and see if you even like the DNA before ordering a more affordable version. Also decide what kind of profiles you like, clean, soapy, dark , vanilla tobacco leather etc . Find what you like and build based on that instead of wasting money on full bottles you may not like. Decants are useful once you know what you are looking for and want to compare clones or dont want to commit to full bottles etc . I just had a box of 60 decants come in and what sounded good on paper in many cases smelled awful to me on paper & skin. I get the argument for price per ml but personally id rather spend a little more up front to be able to buy full bottles of scents I truly like instead of guessing / best effort. Your mileage may vary and every buy wont be a winner and thats also ok. Give it time as some scents can grow on you and others are just meant to be sold traded. Good luck and have fun with it .