I like it alot!

Well it was only meant to be the floor and a waterfall on the back wall but the tile guy did the whole bench and im on the fence about it

Hopefully, the pebbles will provide a bit of traction in your shower to help prevent slipping. I agree with chispa - may not be the most comfortable sitting surface.

I like pebbles a lot but not on a bench (the leading corner is not going to look good) and I really hope its not a foam pan.

They look more like pebble slices rather than round stones? If slices, I think it will be nice with matching grout.

Too much pebble, and it's kinda odd on the bench.

Too much grout to keep clean on the walls.

I hope you have storage built-in behind that pony wall?

Im also not sure on what color grout to use with the pebbles

Pebbles on the bench looks wrong, probably doesnt feel good to sit on, and I imagine water pooling there and it beinch hard to keep clean.

Match the grout to the tile, I.e. dark grout for floor and seat and light grout for walls

I think it came out looking nice… i can confirm the bench is not uncomfortable since it is the sliced pebbles

Thanks for showing us the finished tile, it came out nice!

But I liked better what your original pic showed on my screen that you had 2 different tiles, light and dark gray, where they met in an irregular line with spots of the opposite color tiles intermixed sparcely and randomly.