Literally it is. It has everything needed (except cooperative multiplayer, which would be nice) and is pretty long. True Diablo-clone, but there is not much of high-quality end-game PVE content. There a lot of difficulties, but you can start with the last one in the beginning. Another cool feature would be set items. I mean with true set-bonuses (e.g. stats or skill damage increase) PVP leagues are nice, but its usually boring to play against mindless bots. If you are making such game, feel free to borrow few more things from Diablo 3, e.g. Greater Rifts. Big thanks to devs for bug fixes, though I didnt notice any. The only problem is performance sometimes, when there a lot of mobs on screen and I cast some AOE spell. It really blows up my fifth iPhone. Well done, devs, love this game! Still waiting for the new features.
P. S. If you need, I can help you by translating the game to Russian.