Reviewed in Factsheet Five, Comics Buyer's Guide, and elsewhere, it was then picked up by Millennium,[2] which published the first full-sized issue in June 1996.

Wizard magazine characterized Keyhole as featuring "such a wide range of short stories, from travel strips based on Neufeld's journey through Asia to Haspiel’s wonky superhero 'Billy Dogma,' that every issue feels like an anthology," finishing its review with the assessment, "Haspiel’s stylized black-find-while art contrasts nicely with Neufeld’s earthy cartooning to make for a consistently good-looking comic.

"[6] Similarly, The Comics Journal reviewed Keyhole this way: "Brought together in a single, independent magazine, these artists' strong, disparate talents create a broad reading experience, and a blending of artistic intentions and personal expression like very few others available today in American comix".

[1] Although Keyhole originally only ran six issues, it was a critically acclaimed project that proved to be a launching pad for both Haspiel and Neufeld's careers.

In 2004, he collected his Keyhole travel stories (as well as subsequent ones) in the Xeric Award-winning graphic novel A Few Perfect Hours.