Williams himself spoke fondly of the album upon its release; "It has become something on which I've found myself. This is the right direction for me personally, this is what it is. I saw the whole Robbie thing coming to a close as it was, I couldn't make another album like the ones I'd made, and this has just opened up a thousand other doors. What I am excited about now is making more music. I love all the stuff on the album, I love Rudebox, it's a favourite song of mine. I don't know what's gonna happen now, I'm excited about getting it out there, but I'm more excited about making more."
The album is a mixture of covers and new tracks, in addition to 'Summertime', a song originally written when Williams left Take That and which appeared in the credits of Mike Bassett: England Manager'. Receiving a mixed reception from critics, the album reached the top position in fourteen countries including United Kingdom, Australia, Switzerland, Germany, Mexico, Argentina, Spain, Italy and Finland.
"She's Madonna" was the centre of a tabloid storm after Ashley Hamilton claimed that he came up with part of the song with Williams. Hamilton has claimed he wishes to take the matter to court as he is not credited as a co-writer on the album.
Further controversy arose over the track "The 90s", part of which implies that Williams was ripped off by Take That's manager Nigel Martin-Smith after the band failed to make a profit from a European tour. The song raised the ire of Martin-Smith, who demanded that the song be removed from the album. The omitted lyrics were rapped during the break before the second verse.
In the United Kingdom, the album sold 54,667 copies on the day of release, taking the number-one slot on the albums chart midweek. By Wednesday, the album had sold over 75,000 copies. The album debuted at No. 1 on the Official UK Albums Chart, selling over 147,000 copies in its week of release. Despite reaching the number one spot, sales were far below what was expected by his label EMI, and overall sales were overtaken by his former band Take That's Beautiful World. However, the album performed better than Beautiful World outside the UK. The fallout of the album's relative failure led to the firing of two music executives responsible for the album's development. As of December 2013, the album had sold 514,457 copies in the UK.
The album was released in the Netherlands on 20 October 2006, on the same day the album was certified platinum as a result of pre-order sales of over 70,000 copies. In Belgium, the album sold 50,000 copies and went platinum. It was released on 23 October 2006 in Australia and debuted at number-one, achieving platinum status in its first week. It has since been certified 2× Platinum. 220,000 copies of the album were sold in France on the week of release, as well as 600,000 in Germany. On 8 November 2006, IFPI certified the album 2× Platinum in Europe with sales of over 2 million copies, making it the fastest platinum selling album of 2006. On 20 November 2006, the album reached number-one in Mexico, becoming Williams' first number-one album there. The album was certified platinum there, with sales of over 100,000 copies. Rudebox became the eighteenth best selling album of 2006 worldwide according to the IFPI.