hate to criticize other people's work from a couple of pictures.
is this a paid tilesetter that did the work? handyman? or ?
I would agree that a general rule of thumb is to avoid small slivers, but sometimes the layout and location of some of the other elements of a bathroom dictate the best way to layout the tile, so there are times when you cannot avoid the sliver of tile.
Having said that, as a contractor, I would not be happy with that tile job based on those two pictures.
-odd layout resulting in the sliver of tiles
- closeness of the non-aligning grout joints in the bullnose tile, and the adjacent field tiles
- corner tiles should be symmetrically sized on the two sides of the corner (imho)
- one of the grout joints (marked with masking tape) is not the same as the others
- is this going to be a steam shower (typically don't tile ceiling unless steam shower). if it is, it seems inadequately waterproofed.
-looks like they didn't notch trowel the thinset before installing tile (see green of wallboard in every grout line) . . . did they dot it?
- excessive thin set squeeze-out.
- probably would have tried to have the shower arm in the middle of a tile, or on a grout joint for symmetry. . . this may result in a sliver of tile on the edge.
- probably would have cut the bullnose tile to match the field tile width so the grout lines continue through.
- is this mastic thinset (premixed in a bucket) or cement based (mix yourself)
+on a positive note, the bullnose tile seems to overlap just the right amount to line up with the tile below.
+I would be fine with that size of grout joint (looks like 3/16) for that style of tile.
If the tile job is very fresh, it shouldn't be too hard to remove and start over if that is your inclination.
What is that green stuff that is painted on the wall board?
Again, I don't like to criticize work based on a couple of pictures, but hope that is helpful to you. Good luck on finding the right solution.