Charlie Derry’s review published on Letterboxd :
An excellent and stunning film by Guillermo del Toro, and definitely his best work so far. The film perfectly balances a world of make-believe against the violent but 'real' scenes of war, allowing the viewer to escape into the fantasy as well. With extremely well designed sets and imaginitive creatures, the film verges on horror in places (I can't watch the 'pale man' scene without the light on!), and successfully builds up tension and suspense throughout. With brilliant drama alongside this, you will be on the edge of your seat throughout. As @SilentJoe13 commented, It's like Alice in Wonderland for adults.