I sell artwork of varying dimensions. I do not want the artwork cropped square to fit the template. Do any of the templates work with variable size image? Is it possible to preview the templates without signing up for a trial?
Some templates have a trial version. The trial version allows you to see the look of the template with your products. It would be hard to tell without trying it in your product.
You can also have someone change the image layout of the template of choice to fit your needs.