A great watch … worth it!

I. Story
a. Episode stories: The stories per episode were mostly good. Out of 16 episodes, I like the story of 9 episodes.

b. Series story: From the title, "Start-Up" (or "Sandbox"), it gives the impression that it is primarily about starting up a business or about joining a, well, sandbox program. However, overarching story is more about [1] a love triangle and [2] sibling rivalry. The impression from the series title only takes tertiary importance. It would have been better if the importance was as follows: [1] sibling rivalry; [2] start-up/sandbox/business; and [3] love triangle.

Regardless… the way the overarching stories were delivered and the choice of story per episode were enough to pull up the score for this rating.

However, avoid introducing important facts and then never mentioning it again. For example, Ji Pyung and the sisters have met when they were kids. It was also weird that a bloodied person can pitch his company, that does not happen in real life.

II. Acting
Acting! This is where I had to give a low rating. There were too many crying scenes where the facial expression was neutral. It was obvious they were only "acting" instead of actually feeling and letting their emotions out.

I'm a fan of Suzy but I have to mention this: relax more during kissing scenes, make us feel it, and it doesn't need to be "wild". The kissing scenes can still be romantic even if there wasn't too much lip action. A room for improvement. I love her acting and the way she brings life to the characters she plays but the kissing scenes needs improvement. Relax, take it slow, don't make it wild -- rather make it romantic. Don't act, imagine he's your boyfriend or some secret desire. You want to enjoy the moment, to just let him feel your desire.

As for Joo Hyuk, great job in portraying what appears to be an eccentric, possibly even an autistic, character. It is never easy if an actor is not in the autism spectrum--in particular asperger syndrome. Very geeky, logical, all about facts, and clueless about everything else, especially fashion and social skills. Those scenes where Dal Mi was sending signals and Do San missed it all--those were all great. Sometimes annoying but all of it were relatable. Neutral face, going back to the discussion he was focused on, definitely a character with aspergers syndrome. Well done there.

For Han Na, excellent job in keeping the character mysterious. It was not easy when the character In Jae had a change of heart, especially when it comes to her sister. There were clues but the next moment it's the total opposite. This happens in real life and so it's great to see it on screen.

III. Music
This one is hard. I can not remember any memorable music other than the theme songs.

IV. Rewatch Value
Definitely in my list of series that I'll choose to re=watch.

V. Summary
Overall, the production, story, and acting were awesome. The inclusion of business terminologies and explaining each, that was a very good idea. Explaining the processes, the whys and the hows, definitely a plus. It would have been better if they toned down the "young adult" giggles because that very rarely happens in-real-life. They should've used sandbox and showed the idea behind it and what's happening in it more as well, instead of just providing a free office and free funding.

The "revolutionary" ideas were well thought out especially the app helping those with vision challenges. I do hope such an app exists but we haven't achieved that speed of AI recognition still something to look forward to. Great choices on scenes and I wish they added more, like a team building session where they could feature the beauty of Korea instead of the exact same office.

From a dramatic episode 1 and funny episodes later, to the building up of the trials and tribulations, to the eventually resolution in the latter episodes. it was enough to pull up the overall rating to 9 out of 10 stars.