Did Stanley Milgram's original experiment of six degrees of separation have a good design or was it flawed Explain?

Stanley Milgram's original small-world experiment on six degrees of separation had a good design for examining social networks and the connectedness of people. However, the study has faced criticisms over the accuracy of its findings due to methodological limitations and potential biases in participant selection. Despite these limitations, the experiment was groundbreaking in highlighting the concept of the small-world phenomenon in social networks.