We report two studies in which the interplay between stimulus properties and perceiver characteristics in the appreciation car interiors was investigated. In Experiment 1 three design components, complexity, curvature and innovativeness, which are all thought to affect design appreciation were combined in a fully factorial design. All dimensions were confirmed to affect ratings, and curvature and innovativeness particularly affected the attractiveness ratings. Curved and non-innovative designs were generally preferred. Moreover, participants who were particularly interested in art were more sensitive to curvature and innovativeness. In Experiment 2 two dimensions of Experiment 1 were replicated using similar stimuli. Moreover, the specific effects of a design knowledge treatment were investigated. Results replicated the preference for curved and non-innovative (rather classic) designs. The treatment had only small effects, which support a general rather than dimension-specific effects of cognitive pre-information. Copyright © 2005 John Wiley & Sons, Ltd.