Melek contains two classical Turkish songs, previously performed by Zeki Müren.

Candan Erçetin, who is known for producing her own works, received generally positive reviews from critics who stated that her music addressed a wide range of people.

For her 2003 album, Chante Hier Pour Aujourd'hui, she performed a number of French chansons and received positive reviews from the critics.

[4] Cihan Güçlü, a conservatory student who joined the album team to gain studio experience, helped with composing the song "Şehir".

[11] On 1 August 2004, with the release of Mustafa Sandal's İste (2004) and Hande Yener's Aşk Kadın Ruhundan Anlamıyor (2004), the album went down to number three.

[12] By the end of the year, it continued to remain among the top 10, and on 19 December 2004 it ranked tenth on the list.

Nokta's Cumhur Canbazoğlu described Erçetin as "one of the rare names that can produce works exclusive to themselves" and noted that just like her other albums that were released in the 2000s Erçetin had continued to produce her new work using the elements of Turkish pop music.

He also stated that with Melek, the singer had addressed a wide range of listeners "from hip-hop to art music, from Balkan melodies to Western ballads with modern infrastructures.

"[17] Radioman Michael Kuyucu believed that Melek had more potential to become a hit than the singer's previous album.

In his opinion, the album's format was as if someone was talking to himself/herself and Melek was in fact the story of the lives of Erçetin's audience.

[18] Hürriyet' Tolga Akyıldız wrote that Candan Erçetin had not broken the consistency and professionalism of her posture since her first album.

The "modern but simple arrangements with consistent and self-confident sounds" in the album caught his attention.

He also stated that the album "was about a woman whose love pains are not over, and despite being abandoned and facing unfaithfulness, she had learned to stand on her own".

Erçetin played in the video together with the baby İpek Işık, her cat Blanche, and her boyfriend of two months.