I read the title of the comment below this one before beginning to read this series so Ie xpected it to go down hill. I've only read the scanlations, none of crunchyroll's releases yet (i.e. up to vol 8 ch 46 [actually ch 57]) but I don't think it's gone considerably downhill. It's pretty consistent after the novelty lessens a bit after the first few chapters. And it's good.
It addresses something I've always wanted to compose about: that the tiniest decisions can affect our future in major ways and there is no one true path. Early on we see him drastically change the future, but it is still a happy one. In a way it's sad that those certain happinesses are mutually exclusive, but in another way it's beautiful that they can exist.
And the main character realises he must choose between them, despite the apparent losses it would entail.
Furthermore the 'time slip' isn't a cheat code through his life. HE doesn't go to the future, get info, go back and win big. In the first chapter you'll see a bit of it but later in the story he also realises that he's isn't all-powerful, even if he knows what's going to happen. He tragically fails, multiple times. But has to search for a silver lining when possible.
Finally, it's consistently funny. Though soemtimes I'm just like 'WTF!? o.0' most of the time i'm amused. When they suddenly parodied the works of Fukumoto I was cracking up. It's a shame that almost all the non-manga/anime references are lost on me though, only understood a couple that the target demographic Japanese reader would probably understand. Nice tl-notes for the most part, though.
It's good, and it's focused around the time-travel/re-do the past trope that I absolutely love.
EDIT: Also, the art is insanely cute 😛