Need feedback about something? Whether it's your app, your book or even that awesome new recipe you tried, it's better to approach people in groups of two or three.
The SmartBear blog argues this will result in more constructive criticism:
Some people respond better to a conversation in small groups rather than a one-on-one interview. Approach people in groups of two or three so you avoid dominating the interaction. Plus, watching friends or acquaintances have an organic argument is a lot more useful (not to mention more fun) than prying an individual with "hows" or "whys."
Another tip: when you are posing the question, don't ask what people think, ask them what they feel. While there's nothing wrong with thinking, the response to "what do you feel" will give you a better idea of the user experience.