I'm pleased that reviews of the A4O soundtrack have been generally very positive. Here are three more.
The "Worth Playing" review:
"The soundtrack is pretty decent, too, featuring an epic score produced by composer Michael Bross, who worked for the Oddworld series. His unique touch fits the Ratchet & Clank universe extremely well."
From the Gamer Node site:
"...features a great soundtrack"
And a review from beefjack.com review site:
"The musical score of Ratchet & Clank: All 4 One also helps add feeling to each level: a traditional, bouncy sea shanty adds to the experience of the water based levels, while a somewhat creepy tune adds to the dark forest. As with the environments themselves, the music adds variety to the game."