Roadrunner Records vyslali do studia  za OPETH na kontrolu Mike Gittera, který o nahrávání nové desky „Ghost Reveries“ referuje takto:
„Heard four songs and was blown away....basically, they encompass all things OPETH with a confidence and aggressiveness that smells like a band's best record. Mikael Akerfeldt told the truth when he talked about a return to the heaviness OPETH is known for. The album's opener, 'Ghost of Perdition', explodes into a god-like riff (replete with his unholy roar) before clobbering you with riffs and musical moves that stretch and break the limits of what can be done within the same song.
You can hear a band so self-assured it's frightening. Keyboardist Per Wiberg — now a fulltime member of OPETH — adds hugely to the band's sound without overwhelming or softening the intensity of things. Akerfeldt possesses a much stronger vocal range. And drummer Martin Lopez throws in a lot freer range of rhythms and percussion than you've ever heard in OPETH's sound in the past.
As strong as the sound and mix of the record was with Steven Wilson on the past three record, the sound of this record is crushing. The band, along with engineer/mixer Jens Borgen have crafted a sound that is totally intricate and in your face. I can't wait til the world hears this record.“