It was a fun and light-hearted. The bond between the women in the "Avengers Club" was very endearing. The actresses all did a wonderful job and were very likeable. There were definitely a few part where you had to seriously suspend your disbelief but it didn't detract at all from the story. The "villains" were interesting as well, especially the character: Joo Gil-Yeon who was Hong Do-Hee's adversary. She was very funny in her mannerisms.
The only downside for me was Lee Mi-Sook's daughter. She was just so cold and generally unlikeable. She was very rude and disrespectful. What little character growth the writers tried to give her fell flat.
But that aside I'd highly recommend this series.
The ending was very satisfying!