Many of which pointed out the "melodic catchiness" compared to Heaven, but criticized the songwriting, lack of depth and failure to produce potential hits.

Her debut was heavily influenced by jazzy lounge pop-R&B, similar to the sound of international music at that time.

Under Warner's managing head at that time, Ricky Ilacad, the label collaborated with more international songwriters, arrangers and producers for the second project.

These include The 33rd, Cuban American composer-producer Rudy Pérez, Zomba record-production acts Sean Hosein, Dane DeViller, Andy Goldmark and Swedish composer Jörgen Elofsson.

Smile resembles the same sound from Nina's debut, but only bigger and bolder in terms of incorporating urban-style upbeat rhythmic jams and sentimental ballads.

During the production process of the album, Nina showcased her versatility by taking on upbeat pop-R&B material and soulful acoustic ballads.

"Goodnite But Not Goodbye" was composed and arranged by Roxanne Seeman, John Keller and Stephen Oberhoff.

The song has a rich harmonic chemistry of Nina's mesmerizing vocals and hypnotic urban-style beats with a blend of funky strings.

Mike Luis and Ferdie Marquez were assigned to most of the jobs, including production, arrangement, mixing, sequence and programming, vocal supervision, and back-up.

Smile received favorable response, being praised for its "melodic catchiness" but was criticized for the songs' lack of depth.

Noelani Torre of Philippine Daily Inquirer described the album as "smoothly-produced", stating "There are 12 songs in Smile, and none of them space-fillers or lengtheners.

She was critical of Nina's songwriting in "Can't Say I Love You", calling it "worded too prosaically with instances of faulty grammar".

The lead single "Make You Mine" was called "an upbeat R&B piece that offers a blissful listening experience".

Its upbeat groove and flirty lyrics allowed her to transcend the typical "love song syndrome" most Filipino artists are known for, and spun a reinvented image for the Soul Siren.

Though the song failed to establish the same impact as the previous hits, it was praised for its ability to maintain consistency with the album's focus.

Like Heaven's singles, music videos of the album's songs have playful storylines and youthful ideas, and also uses special visual effects.

Despite the impressive chart performance of the first single "Make You Mine" and a Christmas release, Smile opened to moderate initial sales, with less successful impact to the public compared to Nina's debut album, Heaven.

Due to the chart-topping success of the carrier single "Make You Mine", MTV Philippines and 97.1 WLS-FM made Nina their Artist of the Month for January 2004.