Or is it an action spectacle complete with a solid performance Harry Styles?

Perhaps its yet another affirmation that director Christopher Nolan is one of the leading filmmakers of the contemporary era?

According to early Twitter reactions from movie critics, Nolans latest is all of those things and more.

A master class in craft.

30 seconds in, Nolan once again delivers a spectacular edge-of-your-seat opening sequence.

And then it just keeps upping the tension.

Dunkirkis edge of your seat filmmaking thats fully realized in [IMAX].

Can honestly say Ive never seen anything like it.

See this in IMAX!Colliders Steven Weintraub added.

A lot of people were wondering about [Harry Styles] & unknown cast.

Theyre all great butDunkirkis not about any one solider.

[Its] another brilliant collaboration between Nolan & [composer Hans Zimmer].

The way he mixes in a ticking clock with score is nail biting.

Dunkirkrelies on v little dialogue, but is entirely impactful.

Truly thrilling from first to last second.

A heartbreaking, heart-pounding, nail-biting offering.

Nolan fans, rejoice…Dunkirkrelies heavily on sound of an increasingly fast ticking clock to build suspense.

It may be a cheap trick, but its effective AF.

And for those asking: Harry Styles does well inDunkirk, was pleasantly surprised.

FWIW I thoughtDunkirkwas heads above most everything else this year, theAssociated Press Jake Coyle hailed.

Pure, maximum cinema.

All sea and sky and Rylance.

Dunkirkopens July 21 in theaters nationwide.

Check out more reactions to the film below.