I originally beat Destiny on Xbox 360, but also purchased it for Xbox One as soon as I got the console. This game is amazing replayability, in fact that's what Bungie seemed to focus on. This game is a major grinding game, which is extremely fun when you're a new player. But the grind gets repetitive after a few months. Doing daily bounties over and over just doesn't stay fun for too long. This game is great for casual as well as hardcore gamers, which is why it's a great game to purchase.
The downfalls of Destiny is the tedious grind I mentioned above and the fact that the DLC, while worth it in my opinion, isn't cheap, and without it the game isn't nearly as fun. The story is also pretty bad.
Overall, Destiny is a wonderful game, just don't expect much from the story and if you are expecting to jump into this game and become a top player within a few weeks, you will be highly disappointed. The grind is real!