I found this a difficult watch at times, but I feel like it has quite an important story to tell. At the same time, it's execution may push things in the wrong direction.
I found the acting great and the overall story caused a couple of sleepless nights for me. What lets it down is the characterisation, and as a non-American I found a lot of the high school culture distracting and confusing, because it made so little sense to me.
It also perhaps trivialises depression and fails to offer some super important avenues of help for anyone considering suicide. But I couldn't help but be drawn in.
A big flaw is that it's clearly written for teenagers (despite the 18 rating) and lacks the appeal that other shows based around high school have managed to find for older viewers. These kids act ridiculously stupidly and it can be difficult to relate to them.
I'm really glad I watched it, though.