Greg Dorr’s review published on Letterboxd:
The entire first 15 minutes of Buffalo '66 are spent on a character desperately needing to urinate — and then moaning with pleasure for a full minute afterward — which sounds terrible, but it's improbably terrific. It's the kind of scenario you could imagine few directors pulling off so well, except for maybe Paul Thomas Anderson, and Gallo certainly does not exude that same smart, savvy, mischievous glee. Buffalo '66 seems to come from a different, rawer, almost oblivious type of inspiration. Even if it was all completely accidental, the movie is alternately hilarious and heartbreaking, with both Gallo and Ricci perfect in their very different but equally goony roles. They both ooze specific types of uneasy charisma, capturing a rare duality of bonkers delusion and total innocence. Ricci has claimed that she had no idea what she was doing in her first film role as an adult, and that Gallo was a nightmare, but it resulted in a magical performance on her part.