Make sure you use the Wiki for the reroll guide. Hard to make progress if you don't know what you're doing before hand. Save your self from having to start over after burning a bunch of time.

I've played F2P, is ok until you hit level around 8-2 or your chars go until levl 120, after that you need to start paying, I know this is a GACHA GAME but sorry can't recommend

its a good game has great music and all voice overlay but it dont let u play for hours before it sends u back to the title screen then u have to click start again over and over its totally anoying but i dont see this game getting any more players to it when it does that so it may be canceled pretty soon and it has a really good story to it its worth checking out but not playing long at all