Read or don't.
Pros:
-You get your AoT thirst quenched.
-Stay up to date so nothing gets spoiled
-See Levi be badass
-See Mikasa be badass
-See people die
Cons:
-Get stuff spoiled
-Anime gets you more pumped than manga (Sounds, music, effects)
-You won't enjoy anime as much
But if you cant wait then read it. The anime won't come out until later this year/early next year