Season 1: I admit that it's what got me into the manga. It skips a ton of content, especially in the last arc, but it keeps the core of the story at the very least and the art and animation was fine. Censorship though, was absolure bs, moreso taking into account that they didn't uncensor the head in the first episode in the bluerays.
Season 2: absolute crap. CCG centric billis with a missing main character that shows up for 1 or 2 minutes per episode and doesn't even speak. Tons of plot holes, very obvious ones. Art and animation that is absolutely disgusting, barring Kaneki vs Shinohara. Hell, I've even seen plays with better coreography that some of the fights in Root A.