Short: Fabulous! Chemistry between the leads is amazing, some genuinely difficult issues are tackled and some of the performances are just outstanding. It's a love story, but with many wrinkles along the way. It's familiar in some of its tropes but at the same time unique. Ending was perfect. Really enjoyed this one!

Detailed:
It's 24 episodes, one of the longer dramas I've watched - but I enjoyed every single minute. As soon as I realised where this one was going I was glad they'd given it the extra time.

This one has a love triangle in it predominantly but before you switch off - I thought they had a really interesting take on it, and it was made all the more interesting and difficult simply because both guys were great, so it's not like you are looking for her to pick the "right" one. I thought how this was resolved was really good too. I also thought it was amusing that there are numerous triangles between various cast, whether it's the two mums and the daughter, or the two mums and the restaurant owner, or the two guys and the FL etc. It really felt like they were hamming it up a bit as if to say, if we're going to do a love triangle, let's ramp it up :)

Numerous things come up in the story and each time there's a thought out resolution. The length going to 24 episodes instead of a usual 16 or 20 means that there's time to do a proper job, but at no point did I feel like it was dragging.

Of all the dramas with Gong Hyo Jin (It's Okay That's Love, Masters Sun) that i've seen, this is probably my favourite of her performances. There's one scene where her whole expression is full on, and she goes from a big full-face smile, to crying - and the way her whole expression morphs and her faces changes colour to a deep red, was incredible.

This is probably my second Jo Jung Suk drama (Oh My Ghostess being the first) and I probably enjoy his work a lot more after this (and I enjoyed OMG a lot). His character goes through some tough times - things that I am delighted to see being covered, it's very rare that male medical troubles are ever touched upon and in this they are far more than simply touched upon - his character changes a lot, and he's able to deliver the full spectrum believably.

Seo Ji Hye (Black Knight and Crash Landing On you) was good to see in this drama too, I like how she plays strong women and I actually think her along side Lee Da Hee would be something awesome to see.

There's numerous little cameos too, whether it's Han Ji Min (One Spring Night), Go Sung Hee (Suits, My Holo Love), or one that I am not 100% sure of but I think was Lee Sun Kyun, who Na-Ri goes out on a blind date with and judging by the comments made it sounds like he's the guy from Pasta (a drama that both Gong Hyo Jin and Lee Sun Kyun were in).

Some of the visual effects were added nicely too, some of the repeated use of TV screens to show what was going on in their heads were interesting and at times quite amusing, but keep an eye out sometimes it's not obvious and easy to miss.

Music was fantastic, several tracks stood out.

The ending was perfect. I had in my mind how I wanted it to end, and if they went down that route, how I wanted them to finish in the final scenes and they did just about exactly what I had hoped. Can't ask for more than that :)

Just absolutely great, heartily recommended.