I'd say this is one of Mariana's best build-ups when it comes to character relationship. The scenes where the FMC and MMC interact have such a nice slow, realistic tension. You clearly see the MMC go from tough to soft, and I'd say there were plenty(!!!) of interactions between the two characters that made the relationship seem realistic and REAL.

The backstories of both characters were so real and raw, I think Mariana did such an excellent job fleshing out realistic characters with real problems/trauma and making them so special to watch grow. 

I will say, that if you are a person uncomfortable with age gaps, I'd skip this one. Similar to Kulti's age gap, the FMC is 26 or 27 (can't remember) and MMC is 41. It's not awful, it made me scratch my head a few times, personally, but I think it can be looked past. I think unlike some of her other works, the dynamic didn't seem uncomfortable (No "old man" jokes.. like Hands Down... ick for me personally). 

I think all side characters were super interesting and fun when they made appearances. The sisters, Mr. Cooper, and Miguel were all some of my favorites.

For others interested in the Mariana-verse, spoilers in case you want to skip:

We had a reference to the Reapers from Under Locke, and the Maio house from Hands Down.

Overall, I'd really recommend this book to those who love these tropes:
-Age gap
-Grumpy x Sunshine
-(Adoptive) father figure
-Independent, successful FMC