Well I wasn't there so I didn't interact with Stone City much but they did a good job, they went in independently and it looks awesome.
I don't know about long term but I would have them do stuff in my new house. I had them do this work because I am moving homes but after seeing their work I will be hiring them to do some stuff in my new house.
The one thing I would have loved to see is the caulking job on one of the back splashes just could be a little bit cleaner. There are rough marks in it. only on one of the sinks.
As of right now I would use them in a heart beat.
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