Guardians of the Galaxy director James Gunn is one of the lucky few who have seen Ant-Man already, and he’s giving it a pretty strong.

On Facebook, Gunn wrote about the film, saying that it may be Marvel’s best since the first Iron Man.

Ant-Man may just be my favorite Marvel film since Jon Favreau's Iron Man (well, maybe excluding one film to which I'm partial). Honestly, the movie is a complete blast! I was so happy after seeing it. It's never boring for a second and it's hilarious and warm throughout. It doesn't get caught up in the webbing of its own science-fiction concept like so many movies do these days, remaining simple and elegant. It's a part of the Marvel universe without being ruled by that fact. Paul Rudd is nuanced and charming and funny and is a surprisingly natural fit as a modern superhero (side-fact - Paul must be a nice guy, because he and I dated the same girl in college, and yet I still love him). Michael Peña KILLS IT - this movie is going to make him a huge star. My old pal Judy Greer (she was Deadly Girl to my Minute Man in The Specials (film) many moons ago) is great in a small role. And Michael Douglas is awesome. I think all of Peyton Reed's years directing have led him to making something as deft and nimble and joyous as this; he did an incredible job. And, despite Edgar Wright's parting from Marvel, his spirit is felt through the entire project, and there is no doubt everyone owes him a huge debt of gratitude. I left the theater incredibly happy. So often I see movies by people I love which are just okay - it's great to love a movie as much as I love the people who made it.

That’s some pretty high praise. We’ll have to wait and see if the film lives up to it when its released in theaters on July 17.