Looks nice from the front. However, where they cut the sides looks a little rough. Maybe when the lights, mirrors and paint are done it won't be noticeable at all. And really how often will it be viewed from the side? Enjoy your new bathroom!

i think it looks fine. the rough cut edge (not sure in the photo) can be micro sanded and caulked, it will be fine.

and yes, a cautionary tale on soffits. the one in our kitchen was declared 'empty' until demolition day when there was a big oops on one portion of it. happily i was distrustful of the person who had said it was empty, and didnt order cabinets to the ceiling. the chase was made smaller and it all worked fine.

It isn't the preferred look, but at this point, I'd just finish the bathroom and live with it.

If you had the cabinet company remake the tower, how would it differ? Is the alternative to just make it shorter, stopping at the beginning of the soffit? I'm not at all sure that would be an improvement over the solution provided. It would change the design dramatically, and imho, diminish the high end look you were going for--and have--right now.

Given the big oops circumstance, the solution was pretty well thought out and executed. From what I can tell, you really have to lean in over the countertop to get a good look at the side of the tower where it meets the ceiling. There doesn't appear to be any natural vantage point from which to see the cabinet scribe to the soffit.

As others have said, the mirror, lights, caulk and paint will change things considerably, especially if the paint you've chosen softens the contrast between the two surfaces. When finished, I'll bet it reads "custom job in a beautiful bathroom."

I agree with GN...paneling would look lovely (if I'm understanding correctly)