First off, if your heart is fragile don't try this one. It's one of the best dramas I've seen, but it has a lot in common with Game Of Thrones and a certain wedding...
With that out of the way for the people who don't like nasty surprises, lets start.
Everything in this drama may have been low budget, but the love and professionalism that went into this are undeniable. In so many Chinese action dramas the plot is messy because of censorship editing, but in this one everything made sense.
And the characters, so expertly written, even the side characters had a distinct and rounded personality, especially the FL - a rare treat when it comes to BLs. But the stars of this were definitely the two couples and they all grabbed my heart with their stories and the superb acting.
That is the bottom line for me: If you want a gripping, gritty story with gifted actors, fine music and you don't mind the aches and pains, you have to try it.
(And then go and watch the Happy Ending Version on YouTube...)