We are looking to replace our second floor hallway bath tub and surround. My husband is dead set on a solid surface option for the surround due to water leaks and ease of maintenance (kids bathroom). After extensive research we're focusing on Onyx Collection. I see several sites show a surround with a mosaic ribbon, and a few that have the mosaic also in the niche. The photo below came directly from the Onyx website, so I assume it's possible, but has anyone tiled an Onyx niche?

Also, is the mosaic edge trim non-negotiable? What about the terminating edge trim? I found one or two pictures using a metal edge that I prefer over the Onyx trim.