First off, my standpoint is that I read the translated chapter and the latest is at 90+ right now. I've read CD, MGA, Desolate Era, Stellar Transformation, so that's my comparison as standards for now (not yet ISSTH and BTTH, probably will update after reading for better comparison reference).
Good points:
MC is very likeable, he's the usual victim of bully and mockery because he was weak and useless, but after he powered up, he is not naive and can be ruthless only to the one that hurts him the most (not like MGA's MC that even kill the opponent's entire family, servant, etc) which is a nice sweet revenge feeling but also not over the common moral limit, and how he does it is better than MGA that only decapitate or behead enemies.
His flirts with the heroines are one of the best that I've ever seen (really fun to read, you will grin and giggle while reading it)
And the BEST POINT is that this is not just the usual weak MC get power up and beat 'em up plot, MC's a smart one and often play tricks on their opponent and this can be mind-blowing sometimes and is really fun to read. so yeah, it's not just the usual 'I hate you, I'm gonna beat you up' style.
I would rate this above Coiling Dragon because of the great romance part and the trickery part that CD lacks.
If you have read MGA and you say its story is good, this is as good as that (if not better), and the MC is much much much MUCH more likeable.
10/10 recommended, just try to read it until couple dozen chapters and you most likely will fall for this novel (it's not a slow start like CD)