I have no idea since I really dislike shower niches I find they are always skuzzy and I see no reason to want to high light a bunch of shampoo bottles I like a caddy that has not solid bottom that hangs over the wall of the shower , easy to clean and remove .

I would never build or remodel without adding a shower niche. I try to design them so that they are not a design feature, but a useful storage area. Shower caddies are great if you bought a house without a shower niche and need some storage in the shower.

Skuzzy caddies or niches are due to the owner's cleaning habits and not the actual product!

Thus the reason I install removable glass shelves in my niches. Place them in the dishwasher done.

I’m short (5’1”) The top shelf would be a real pain for me to keep clean because I wouldn’t be able to see it.

Add me to those who don’t like the over the wall caddy. They get just as dirty as the niche and are harder to clean. I do like the idea of glass shelves that go in the dishwasher.

Ditch the prefab and the tile slivers that it creates. Do a custom size that fits within the tile size you are using with no cutting.