Become a customer yourself. An excellent way to gauge the attractiveness of your display is to take a photo of it. The camera can capture aspects of the display that may seem off and it can shed light on components that you may need to reposition or adjust.
Upload it to social media and see if you'd feel comfortable uploading it without filter. If you feel like putting it on Instagram right away, your design seems pretty good! If a filter was urgently needed, you may want to consider to make further adjustments.