First I hate niches in showers I also do not like penny tile on walls as for the trim I do not like white schluter it never matches the tile white and IMO the silver one gives a very nice clean edge and you barely notice it at all. I am seeing no attempt at waterproofing so not even close to tiling and IMO the waterproofing needed to be done before the tub was installed . I would not have chosen eithr of those tiles for a shower and for sure not in a kids bathroom which I hope is what this is because any other use for a J&J is awful. All of this should have been figured out before now.

Thank you very much for your feedback. If you have a second, could you please let us know why you would not choose the tiles-- is it a matter of style, quality, safety, or another factor? This is a kids bathroom- boy/girl shared. Thanks again for your time reviewing this post!

My original baths have no niches and when we added a master to my house we put one in. I love having it. I hate cheap wire racks hung on plumbing and I hate products on the edge of a tub or shower floor. A well build niche or ledge is very useful and looks more finished to me. Yours is in a great location for the clutter is out of view from the bathroom proper.

Will you be water proofing your niche and walls? It should be waterproofed.

Accent stripes are indeed falling out of fashion but I still enjoy the one put in my bath in 1920 and put one in my addition four years ago to mimic but not replicate the exact original flare of my house with no regrets. It is a personal choice and what I like or Patricia “ hates” is really irrelevant.

Did you choose the accent tile because you loved it in inspiration photos? Does it make you smile or are you following a tend you feel must be followed? Are you one to like your decorating choices years after they were installed, a one and done type, or do you follow the latest “greatest” trends. If you are in the first category follow your heart with your tile choices but only after properly building the structure. Is there poly behind the CBU? If not you need a outer waterproof layer between the cement board and your tiles.

We used silver schlueter on all the edges in our master bathroom renovation.

while it is true that the accent tiles are not currently in favor, I still see people doing them. So, if this has been your vision, go for it. Your choice of penny tiles certain is not drastic.

You should have your backer spanned over the tileable flange in your tub that is the purpose of the flange. Go ahead and read the specs on fastener type and placement from USG. Make sure that drywall mud is removed and not left underneath A tile installation.