"Someone who can't sacrifice anything can never change anything."
ALL THE FEELS!
Action filled anime with really, awesomely, sexy screaming [Referring to a particular male titan in EP9]. Little plot twisting, high tension (jokingly from the strings of the maneuver gear), a massive play with camera angles.
I overall loved Shingeki no Kyojin. The only downside to it, would be the slight dragginess which brought enjoyment from a 10 to 9. Personally, brought it to the top of my favorite list.
Art would be 9 due to shadings. Wonderful art that doesn't rely too much on those magical feeling but occasional over darkened shadings. (usually seen in ember light settings).
9 for enjoyment due to aforementioned reason, dragginess. Other than that, its filed with feelings and up most enjoyment.
Looking back at my list, I do not need to even double confirm that Shingeki no Kyojin is ultimately the top of my favorited list.
Is it worth watching Shingeki no Kyojin?
Yes.
You will miss out a good anime if you don't.