I think this is a pretty solid 4 star soundtrack release. I'm giving it 5 stars to offset the other reviewer who gave it a 1 because it wasn't what he thought he was buying, despite apparently not researching it at all prior to ordering.
For those who don't know, Ong-Bak originally had a Thai-rock style soundtrack/score, but when Luc Besson's production company (EuropaCorp) picked it up for international release, the film was re-scored with a primarily hip-hop inspired soundtrack. This is the version that is represented here, and the version that was distributed to the US. If, perhaps, you saw an import bootleg before the film's official US release, you may not be familiar with this soundtrack. Similarly, if you saw the UK release, it was re-scored once again with an orchestral score. However, if you saw the EuropaCorp official DVD release, these are the songs you heard (plus some others).
I'm not a huge fan of hip hop, but for whatever reason, I seem to like foreign hip-hop more than its American counterpart. Maybe not being able to understand the lyrics actually adds to the experience for me. The songs on here are catchy and well-made. The ones used in the US cut of the film flow well with the action sequences and I think make for an enjoyable soundtrack experience. If you're a fan of Ong-Bak (and you enjoyed the hip-hop songs in the movie), then I think you'll like the soundtrack as well. Worth checking out if you can find a copy. Also, since the Amazon product description only lists the song titles, here's a list of the artists & titles included here:
01. Tragedie - Je Reste Ghetto (Feat. Reed the Weed)
02. Busta Flex & Horseck - Le Son Des Gosses Bo' (Feat. Djam-L)
03. OGB - Battle Royale
04. Kayliah - Le Code De L'honneur
05. Koba Ali - Hors D'atteinte
06. King James III - Have Ya' Heard
07. Pegguy Tabu - Le Temps D'une Chanson (Feat. J. R.)
08. Kamnouze - Le Nouveau Dragon (Feat. Candy Ken)
09. Horseck - Me Battre Encore
10. Rapp'deze - Wake Me Up
11. Lord William - Wine Up
12. Tonystone - Challenger
13. Asto & Omyk - J'ai Pas Voulu Frapper Fort
14. Prince D'arabee & Kimy - La Rage De Vaincre
15. Ol Kainry & Jazzy Jazz - Le Combat
16. Aymeric Beguin & Eric Melville - Final Fight