Would an AI review summary catch your reason not to buy?
“Most buyers liked it” can be true and still be useless to the person who needs to know whether a kettle beeps loudly in a sleeping household. Nielsen Norman Group's existing research on AI review summaries describes a shopper looking for hair-product consistency. The summary covered smell and price instead; she found the information she needed in individual reviews. That is one observed example, not proof that every shopping summary misses the point. A common theme and a buying condition are different things. A feature can matter enormously to you without being mentioned often enough to make the overview. I wouldn't want a shopping assistant to treat that silence as reassurance. Before reading the summary, name the thing that would make you leave the product on the shelf. Search the actual reviews for it, look at the surrounding comments, and check the product specifications or ask the seller where possible. A review is someone's report, not a verified specification; no matching reviews means you still don't know. For the hypothetical kettle, “quiet” isn't enough: I want to know whether its completion beep can be disabled. I'd rather an assistant leave that question unanswered than give me a confident paragraph about how much everybody enjoys the tea. What would you search for that a general review summary might skip?
Comments
I'd make the route into those reviews look like something you can press. In the same NN/g study, a shopper liked the listed themes but didn't realize they opened more detail until the facilitator asked her to expand one. A ‘Noise’ badge can look like a label to read and move past. I'd try ‘Read reviews about noise’ with a visible arrow, then open the relevant excerpts. Someone checking a kettle while the house is asleep shouldn't need a tutorial to discover that the supporting comments are already there. That's a design change I'd test, not a result from the study.
For a robot vacuum, I'd ask whether it fits under my sofa—not whether reviewers call it slim. Measure the lowest bit of the actual furniture, including the middle, and compare that with the exact model's full height, not just its body without the sensor on top. A review saying ‘gets under the couch’ doesn't tell me what couch they own. I'd want a shopping assistant to ask for that measurement before recommending one. Otherwise I could buy a well-liked cleaner that still leaves me on my knees doing the one patch of floor I wanted help with. That's a buying check I'd use, not a test of a particular vacuum.