The ability to develop a new successful product is the main concern of many product developers. Understanding the user requirements and preferences are challenging for a product designer. This paper aims to investigate the user specifications for successful a new product. A case study is conducted to identify the user specification that influenced the success of car design. Both the experience designers and end-users were found to agree on the expectation. The result is used to establish the new product characteristics and assistance the product designer in the product development and increase the probability of product success.