Several songwriters including Armando Manzanero, Juan Luis Guerra, and Kike Santander contributed to the compositions in the record.

The record reached number one in Argentina, Spain, and the Billboard Top Latin Albums chart in the United States.

Miguel enlisted the help of songwriters such as Armando Manzanero, Kike Santander and Juan Luis Guerra with several of the compositions in the album.

"Y Sigo" is an uptempo number which "contrasts with the song's lyrics of lost love" while "Devuélveme el Amor" has the singer visit "his old friends solitude and desperation".

[12] "Te Necesito", composed by Guerra, is a "bouncy, airy pop" song with "finger-snapping beats" and vocals backed by Take 6.

[12] "Te Necesito" was released as the album's first single on 3 September 2003;[4] it reached on the top of Billboard's Hot Latin Songs chart in the United States.

[23] An editor for AllMusic rated 33 four-out-of-five stars noting the uptempo songs projected "images of a Spanish Solid Gold-like variety show" and felt that Miguel "delivers" on ballads "Nos Hizo Falta Tiempo," "Ahora Que Te Vas," and "Que Hacer" as examples.

[12] The Chicago Sun-Times critic Laura Emerick gave the album 2.5-out-four stars commenting that while Manzanero "drafted some dropdead gorgeous stunners" ballads, she mentioned that they are "smothered under the usual blanket of heavy strings and synthesizers".

[11] The Dallas Morning News critic Mario Tarradell gave the record a "C" rating for having similar arrangements to Miguel's previous pop albums.

Tarradell compared "Con Tus Besos" to "Suave" from Aries and "Sol, Arena y Mar" from Amarte Es un Placer (1999) with its "same horns, percussion and soaring chorus".

[7] Hiram Soto of The San Diego Union-Tribune rated the album 2.5-out-of-four stars and stated that 33 "re-emphasizes the singer's limitations of recording either pop or boleros" and called it a "safe bet".

[8] San Antonio Express-News reviewer Ramiro Burr gave the album three-out-of-four stars and praised the production on the record and Miguel's vocals.

[29][30] At the 5th Annual Latin Grammy Awards in the same year, it was nominated for Best Male Pop Vocal Album,[31] which was also given to No Es lo Mismo.

[37][38] The album was certified double platinum in the Latin field by the Recording Industry Association of America for shipping 200,000 units.