I played it in beta and leveled a character at level cap some years ago.
I can say the game is very fun (especially the dungeons or whatevaer they are called), I really liked the combat system and the story is (not well developed) but cool.
But the classes are SO unbalanced in PVP and PVE, you basically have to stick to the op class of the moment to join every instance or battleground.
Also, like every free MMORPG, the game is basically pay-to-win, there will be a moment where everyone who donates something wil be ahead light-years above you on equip and everything else, you need to pay even to create more than 2 characters.
My advice is: play it with a caracter you like until level cap and then realize how the games is made to suck money out of your pocket and start another MMORPG like WoW that has yes a payment subscription fee, but at least you're on the same level as anyone else.