“The music reflects the balancing act that is faith and life. The eternal tug of war between the difficult choice and the easy solution. Between the beautiful and the ugly with short trips past all the grey zones in between. In this way, Builder's music becomes universal, whether it is for the divine, the spiritual or something completely different. It is a beautiful and overwhelming experience." 

“Musikken afspejler den balancegang, der er troen og livet. Det evige tovtrækkeri mellem det svære valg og den nemme løsning. Mellem det smukke og det grimme med smutture forbi alle gråzonerne derimellem. På den måde bliver Builders musik almengyldig, om man så er til det guddommelige, det spirituelle eller noget helt tredje. Det er en smuk og overvældende oplevelse."
♥♥♥♥♥♥ (6/6 hearts) - David Dyrholm, Politiken Newspaper
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”My high expectations were quickly realised when I first listened to the album - from the first second I was transported to another world.
Strings and deep drums create an eerie introduction, while horns step in and out of the audible field, in and out of the shadows. Or is it really the listener moving around in the darkness? It certainly feels that way…”

“Mine høje forventninger blev hurtigt indfriet, da jeg første gang lagde øre til albummet – allerede fra første sekund blev jeg hensat til en anden verden. Strygere og dybe trommer skaber en foruroligende introduktion, mens blæsere træder ind og ud af det hørbare felt, ind og ud af skyggerne. Eller er det i virkeligheden lytteren, der bevæger sig rundt omkring i mørket? Det føles i hvert fald sådan…“
- Kristoffer Møllegaard, Passive/Aggressive
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"Intensity, control, improvisation and looseness increase and decrease again during the course of the work, featuring chaotic strings, infernos of talk and song, strikes on the strings, uncontrolled winds, repetitive mass and chaos replaced by silencio, silence. The voices and the sounds in your head speak against each other, pulling you in all directions, gathering and taking new paths again...an excellent work for seekers..."

“Intensitet, kontrol, improvisation og løssluppenhed tager til og aftager igen i løbet af værket, der byder på kaotiske strygere, infernoer af snak og sang, anslag på strengene, ukontrollerede blæsere, repetitiv messen og kaos, der erstattes af silencio, stilhed. Stemmerne og lydene i hovedet taler på tværs af hinanden, hiver dig i alle retninger, samles og går atter nye veje....et fremragende værk for søgende…”
- Julie Hugsted, Seismograf
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“Builder brings about a symbiosis of overflowing beauty and rumbling disturbances.” - T.S Høeg, Jazz Special
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“There are so many images hidden in Murmuration: faded, esoteric and blurred as if photographed with trembling hands…ambient passages interrupted by mechanical rhythms and chaotic passages striking like a sudden storm”
”Der er så uendeligt mange billeder gemt i Murmuration: Falmede, esoteriske og slørede som var de fotograferet med sitrende hænder…ambientpassager afbrudt af maskinelle rytmer og kaotiske passager, der rammer som pludseligt tordenvejr”
- Rasmus Weirup, Seismograf
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“Builder's solos burns with phosphorescent intensity...”- Fred Grand, Jazz Journal
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“In Builder you have a composer that is exciting to follow” - Jan Granlie, Salt Peanuts
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"Those who see, or rather hear, a totally unique musical excursion, are definitely onto something. Builder has created moods and tensions and conversations that are more than interesting to be invited into. Calum Builder has immediately told us that he is a unique and exciting voice."
- Tor Hammerø, Nettavisen
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"I can hear that this is a work that can go down in history as one of the great church works, and which can, and should, be performed in a number of church rooms around the world...Mighty, exciting and incredibly beautiful!"- Salt Peanuts
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“Enriched with the sounds of the saxophone, over time all phrases stick together, giving the impression that they arise from one immense voice.”
-Andrzej Nowak,  Spontaneousmusictribune
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“Builder possesses a sound of his own”  ★★★★  - The Canberra Times
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“Builder is brimming with fresh ideas” - The Australian