I have just been browsing Amazon's listings for dog whistles, and found the vast number of choices to be quite surprising. I'm now wondering if "you get what you pay for" would apply in this situation. If so, then I would spend more for a higher end product. But, since I know nothing on the subject, have doubts about whether there is much of a difference in the performance of one product over another. I am not concerned about durability or appearance.
To avoid asking a subjective question, I am hoping that someone has had enough experience over time, in situations where dog whistles were used or in conversations with other users on the subject, to say that the results produced are noticeably different depending on the whistle being used. If so, what type, style, feature, brand(!), aspect or other property of the dog whistle makes it perform the best and by how much?