I love it. I love it. I love it.
Only 4 stars because something I don't like is- the on/off relationship situations of everyone. Literally everyone. Why couldn't Andy and Jack stayed together? And why has Maya to get together with Carina? The worst thing for me is that Maya and Carina end up in a marriage. Don't get me wrong, I am bi myself but I just don't feel their relationship. The storyline is great, the characters are not only firefighters, they have a complex back story and interesting private lives. I like the crossover to Grey's Anatomy.
All in all, the series is great and I love it.