4Music called the song "an absolute banger" and said "the former X Factor star has already began cracking the American market with her previous album, and with her latest offering—a catchy ballad with heart and soul—a massive break seems inevitable.

"[4] Idolator's Carl Williott said "the production is pretty standard pop fare, with a few hints of electronics whooshing in and out, but everything evaporates for the first bars of its truly triumphant chorus, before it all swoops back in to lift the vocals even higher" and further claimed that "it was completely worth the wait.

"[5] Bradley Stern of MuuMuse said that "[Sirens] is a soaring follow–up to 'I Wish'—and it's a proper SMASH," going on to state "striding into the speakers on a gentle guitar strum, Lloyd drops the swag shtick and supplies us instead with a full–bodied, super grown up midtempo power ballad of mega–proportions: That chorus is just, like, whooooooosh," and further labelling it "massive and glorious.

"[9] Idolator's Robbie Daw claimed "the video takes the whole affair to a more emotional level, as the story of a woman bound to her drug–dealing boyfriend plays out.

His eventual arrest leaves Cher sobbing in a hallway, until at last she embroils herself in the whole mess by running out of the house with his stash and burns it to protect him.