Rosenberg described Free as "heavier, darker, more experimental and a lot more consistent" than the first album. Stewart Mason of AllMusic described the album as "downright commercial in a way that none of the duo's previous projects have been". He regarded the album as less like the "standard-issue epic metal" of the first album and more like "Evanescence's gothy metal-pop crossed with late-era Radiohead's fondness for electronic interference".
Rosenberg described Free as "heavier, darker, more experimental and a lot more consistent" than the first album. Stewart Mason from AllMusic characterized it as commercially oriented in a way that none of the duo's previous works had been. He viewed the album as less epic metal than their first album and more like a blend of Evanescence's goth-metal-pop with Radiohead's electronic interference.