This game is addictive. If you're willing to grind, the monetisation really isn't an issue. I haven't played for a while because other things have taken up my time but it's the kinda game that, once you're ready, jumping back in is no problem.
The bosses are somewhat repetitive and the difficulty curve can be a real pain to unlucky players who don't p2w. I never spent a penny on the game and it took me I think until the second week of playing to get a even a legendary weapon! The day after I got a mythic level pet and the game became easy again.
Communication in game is awful. Really pointless, needs serious work. But other than that it's great fun overall.