I didn't know anything about Granblue until now, except for the fighting game. But after 50 hours of playing, I can say that I really like this game and its universe.
The story is pretty good, it doesn't blow your mind with complex plots, nor does it make everything easy for you. And that's good for me.

The visual section in general is beautiful, the campaign has incredible views of the setting, the characters look pretty good, the effects in general are very good too, except that in combats sometimes I have a hard time seeing the enemy because of so many effects (especially in small enemies, like humans)
As for sound, it's pretty good and it goes along with the fantasy setting of the game. The music is really good, it has several ost that I would listen to again in places like YT while doing something else.

The gameplay is very fun, the combats are increasingly dynamic and difficult as you advance in the story and doing the hunting missions (Monster Hunter type) and playing cooperatively with friends (4 players in total) is much more fun still. .

During version 1.0.3, I found two minor issues with the game:
- When opening the game, the screen went black after showing the company logos.
- The online coop mode had some sort of region lock that didn't allow you to play with people from other parts of the world, and you had to change the steam download region in order to play with them (I'm not sure if it was a bug or it was just made that way)
- The matchmaking for playing quick missions didn't work.

The next day (I think) in version 1.0.4 the aforementioned issues were fixed, matchmaking works, you can now play with your friends who live anywhere in the world it seems, and the game no longer goes black when opening it (at least it hasn't happened to me again after the update). And that gives me the impression that the developers are paying attention.

I give it a 9/10 and recommend it.