The show is pretty cute in general, I was on board then wanted to drop it around episode 12. I was able to finish the entire thing but it wasn't without its issues. Every time a character solved a problem there was another problem right after it. Every time a character had to leave, someone was behind them to take their place. Such as the random transfer student that shows up in 'The Getaway' and her link to another girl who appears later. She doesn't need to be there and it feels like they didn't know what half of the new characters should be. The show has its moments of rest but then it jumps right back up again and wants to be funny. It's an indecisive piece of media but it works sometimes. Also, the ongoing problems between Uehara and Issei get kind of annoying at times, and Nao doesn't even seem that great to fight over in the first place. Nao seems like an interesting character but every once in a while she just gets too annoying. A lot of the characters' conflicts begin to be too much or go on for too long, or be entirely unnecessary. For example the episode about Issei and Nao having to pretend to be on a date to reject a random girl that never comes up again, it felt out of place and tacky.
TLDR: The show is constantly up and down in tone and it basically gives you whiplash. Too many things are introduced too quickly, and the main character and her problems can and might make you irritated.