I've been had. I've read in the comment section that the love triangle is not an issue & so I started watching this with no reservations, unfortunately that is definitely not he case. The triangle is - at least from my perspective - pretty bad, not only is it present throughout most of the drama, but also the plot devices used to keep it going were not great. Okay, it's objectively not horrible compared to some of the worst offenders, like it's nowhere near Jealousy Incarnate bad. Yes, the FL never hesitates about whom she wants, but her rejections were most of the time half-hearted & she got teary eyed due to the second ML way too many times. I couldn't even FF button his scenes, because the second ML is just to integral to the plot.
I'm guessing that people that like this trope would love this though..

Okay with that out of the way, I think the second biggest problem with the drama is that it's quite draggy at times, the same misunderstanding is recycled over and over to make it far longer than it should've been. Also the plot is not very polished or coherent, there are some really weird shifts in the story. For example how we transition from e27's cliffhanger to e28 makes less than zero sense to me. The corporate embezzlement/laundering case in the final episodes was quite bad as customary, but I've seen worse.

So why is it still 7.5? Well, the things that everyone else is saying are true. Both couples had great chemistry, the acting is great, the comedy is on point as well. Also the macro plot is pretty amazing. Annoyances aside it's fantastic how they handled the dream situation. Before watching this I was totally prepared to talk about how cdrama time travel shows always have to be dreams, novels, or just imaginations due to recent changes in Chinese censorship guidelines, but they've really killed it here. They way how the dream ended is just about perfect. The way we transitioned back to real life & how they kept the fantasy going was also pretty great. (I mean While You Were Sleeping is a hundred times better, but for a contemporary Chinese drama this is really pushing the limits of what's possible to be shown on TV) I've recently complained about how in Business Proposal they've cut out my favorite part of the webtoon and the Asian drama gods have heard my plea, because that exact plot is here in this drama. (It's about the FL wanting to turn fake into real & pursuing the ML real hard) The second couple was pretty fun, though their story is 1:1 Toradora.

The OST is not bad, at least as a completely separate entity from the drama. However I think the tracks often did not fit the drama's mood & the mixing is just strange.