PROS:
-Faster Than a Kiss was a pretty good, fairly typical shoujo read. Given that the love interests are living together, there are more opportunities than usual for those really cute shoujo love-love moments, and Faster Than a Kiss does those well.

-The main characters are pretty likeable, and the story isn't weighed down with concerns like 'actual real life consequences to actions' or 'reasonable adult characters'. That may be a pro or a con for you, depending on what you're looking for. I was in the mood for it at the time, so it was a pro for me.

CONS:
-The main character has the tired manga trope character flaw of freaking out, yelling and screaming, and kicking people into the stratosphere when anything remotely surprising happens. Personally, I find this exhausting. It doesn't make her overly obnoxious or make the manga unreadable, but that trait in particular gets boring.

- There is surprisingly little plot for a 50+ chapter manga with long instalments. Honestly most of the manga takes place in a 'shoujo holding pattern' of:
1. Let's go on a secret date!
2. Something is causing tension between the couple!
3. Sub characters interfere with the date!
4. Oh well, we'll get our chance another time!

- The overarching plot of Kazuma being estranged from his father makes absolutely no sense, was in no way resolved, and was just periodically used to throw a wrench into the works with no logic to why it should be as disruptive as it ends up being. The father, completely arbitrarily, interferes with Kazuma's life despite having 'cut all ties' with him, and he just goes along with it instead of putting forth the completely reasonable response "No, you never showed any interest in parenting me, disowned me, and I've built my own life so with all due respect you can f*** off and die." The fact that at the very end (HUGE SPOILERS) he arbitrarily decides that they can get married but Kazuma has to go live on a remote island and teach there for four years so that he and Fumino can't live together? What the ever loving crap was that.