Some interesting thoughts about the AirPods by Steven Aquino. In particular, he highlights a weak aspect of Siri that isn't usually mentioned in traditional reviews:
The gist of my concern is Siri doesn't handle speech impediments very gracefully. (I've found the same is true of Amazon's Alexa, as I recently bought an Echo Dot to try out.) I’m a stutterer, which causes a lot of repetitive sounds and long breaks between words. This seems to confuse the hell out of these voice-driven interfaces. The crux of the problem lies in the fact that if I don’t enunciate perfectly, which leaves several seconds between words, the AI cuts me off and runs with it. Oftentimes, the feedback is weird or I’ll get a “Sorry, I didn’t get that” reply. It’s an exercise in futility, sadly.
Siri on the AirPods suffers from the same issues I encounter on my other devices. It’s too frustrating to try to fumble my way through if she keeps asking me to repeat myself. It’s for this reason that I don’t use Siri at all with AirPods, having changed the setting to enable Play/Pause on double-tap instead (more on this later). It sucks to not use Siri this way—again, the future implications are glaringly obvious—but it’s just not strong enough at reliably parsing my speech. Therefore, AirPods lose some luster because one of its main selling points is effectively inaccessible for a person like me.
That's a hard problem to solve in a conversational assistant, and exactly the kind of Accessibility area where Apple could lead over other companies.