I played it when it first rolled out, it was fun as a FTP game until you maxed out your player level. Once that happened the game felt very predatory for $$$. Also PvP was completely PTW. YMMV

There have been improvements to the game, like a PvP mode that does not rely on P2W, but the game as a whole is just your typical predatory mobile cashgrab. If you have played these types of games before without spending anything, then by all means, try it out. If you however are the type of person that gets annoyed by the progression walls these games put into place to make you spend money, don't bother because there are a lot of them in this game.

As a game? Technically yes, somewhat similar is quality to Diablo 3. Although, monitization is beyond egregious, talking 10s of thousands of dollars people have spent on this game. I avoid it on principle, but hey if you want a game that works on a tablet I guess technically this counts.

Just play the story, it’s completely free and quite fun. And then you can decide if you want to grind everything else.