Your Service Advisor can make a huge difference here.
"Alex" at Seattle and "Clif" at Bellevue have both given me excellent service over the years in understanding what I wanted and ensuring the work was done properly. They are not hesitant to get one of their shop foremen into the discussion as necessary. (I especially remember how Clif worked with BMW NA in handling my first HPFP failure in my early-build E92 335i.) Perhaps most telling is that both SA's are car guys who get it. That alone goes a long way for me.