What reasoning error is displayed with the claim that just because someone had success with a product, it will work for others as well?

The reasoning error illustrated in the claim that just because someone had success with a product, it will work for others as well is best identified as a hasty generalization. This fallacy occurs when a conclusion is drawn based on insufficient evidence, often from a limited or unrepresentative sample size. In this case, the claim takes an individual's positive experience and inappropriately generalizes it to everyone else, ignoring the various factors that could influence different outcomes for others. This highlights the mistake of assuming that what works for one person will universally apply to all, without considering the broader context or diversity of experiences.