Love this cabinet, very well made, beautiful real quartz top. 
Only complaint I have is it didn’t give measurements on the back of the cabinet to judge for plumbing issues. 
I’m having to cut a piece off the back and drill a large hole in the middle cabinet shelf to allow for the drain trap. 
Surprised the manufacturer didn’t build the back opening to accommodate a typical 18” standard height drain from the wall into consideration. 
Atleast it’s nothing you’ll notice once installed. 
Just gonna have the drain thru a hole in shelf when u open the cabinet door.