Dior designs upheld); 15 U.S.C. § 1114(1) (registered mark cannot be used without registrant's consent if such use is likely to cause confusion or mistake, or to deceive). The underlying rationale is that an imitator is entitled to truthfully inform the public that it believes that it has produced a product equivalent to the original and that the public may benefit through lower prices by buying the imitation. Saxlehner v. Wagner, 216 U.S. 375, 380-81, 30 S.Ct. 298, 298-99, 54 L.Ed. 525 (1910) (Holmes, J.); Chanel, 402 F.2d at 567-68.
When the grant of a preliminary injunction rests largely on a decision that the movant has demonstrated probable success in showing likelihood of confusion, there is a division of opinion as to the scope of appellate review. In Frito-Lay, Inc. v. So Good Potato Chip Co., 540 F.2d 927 (8th Cir.1976), a breach of contract case that applied trademark infringement law, we stated: “We do not say that six eyes are necessarily apt to reach a more accurate assessment than are two, but, under the standard of review applicable in this case, our six eyes tell us that [there is a deceptive similarity].” Id. at 931. In contrast, the panel in SquirtCo v. Seven-Up Co., 628 F.2d 1086 (8th Cir.1980), stated what appears to be a widely accepted view that likelihood of confusion is a finding of fact. Id. at 1091. Significantly, however, in the context of reviewing a denial of a motion for a preliminary injunction in a trademark infringement action, the Second Circuit stated that “where it is plain that the disposition is in substantial measure a result of the lower court’s view of the law, which is inextricably bound up in the controversy, the appellate court can and should review such conclusions.” Alexander’s, 299 F.2d at 36.
Because we may review the district court’s likelihood of confusion determination when, as here, its conclusions are inextricably bound up in its view of the law, we conclude that the district court’s opinion failed to take into account sufficient evidence on which to base its determination of Calvin Klein’s probable success on the merits. A multitude of factors that a court may consider in determining likelihood of confusion has been articulated by this and other courts. See, e.g., Beer Nuts, Inc. v. Clover Club Foods Co., 711 F.2d 934, 940 (10th Cir.1983) (citing Restatement of Torts § 729 (1938)); SquirtCo, 628 F.2d at 1091 (listing factors). However, while no particular factors are determinative, neither should excessive importance be placed on any one factor to the exclusion of others. See Piper Aircraft Corp. v. Wag-Aero, Inc., 741 F.2d 925, 934 (7th Cir.1984); Beer Nuts, 711 F.2d at 940.
Here, the district court’s determination of Calvin Klein’s probable success in demonstrating likelihood of confusion was based exclusively on the court’s own visual inspection of the perfume packages and store displays. Its opinion does not refer to any other evidence before it from which actual or likely consumer confusion could be inferred. A court does, of course, have broad discretion in the weight it chooses to give all materials submitted by the parties. See SquirtCo, 628 F.2d at 1091. Here, the court did not indicate the weight, if any, that it gave any other evidence offered by the parties, such as consumer surveys and affidavits of experts regarding the effect of the materials on consumers. Visual inspections by the court are permissible as an aid in determining likely confusion. Caron Corp. v. V. Vivaudou, Inc., 4 F.2d 995, 997 (2d Cir. 1925) (reversing grant of injunction pendente lite on grounds of insufficient evidence of consumer confusion). However, caution should be exercised to avoid putting too much stock in a subjective inspection done in-chambers that is devoid of market characteristics. See, e.g., Beer Nuts, 711 F.2d at 941-42. A realistic evaluation of consumer confusion must attempt to recreate the conditions in which buying decisions are made, and the court should try to determine not what it would do, but what a reasonable purchaser in market conditions would do. In light of these concerns, the district court’s in-chambers visual inspection by itself, in the absence of reference to any other supporting evidence that could give rise to an inference of likely consumer confusion, was too narrow a context on