I went to the dealership's service shop with a laundry list of potential repairs and maintenance items on my 10+ year old Nissan.
The good - they recommended inspecting the maintenance items and only perform the work if required. That saved me money. The items in my list, I had already quoted in other places and had little intention to get repaired at the dealership... but their quote was very competitive, so I had them do the work. They also called me with additional items I didn't see myself and quoted me a reasonable price, so I had do the work. They also gave me a free rental due to the scope of the repairs. By the way, free coffee, internet and cookies were appreciated.
The bad - their back office processes are so time consuming, they have little time to be proactive with recommending additional inspections. For example, my 10+ year old car had an issue (it was on my original list) that caused the car to sway at high speeds. It turns out there was a service bulletin issued back in 1998 that recommended inspecting and replacing certain components that were known to wear away. I had brought my car to this dealership before, you would think they would have caught it back then... but they didn't. Instead, I had to bring it to their attention, they did the inspection and guess what? The components were worn out.
I don't fault the workers... I fault the management, who allow back office processes to become so bureaucratic and probably invest so little in IT that workers are busy typing, looking for paperwork, etc.. to have little time to be proactive with the customer. To management, I suggest you pick up a book on process improvement... like Transactional Lean Six Sigma for Dummies.
In the end, if you know your car... stay on top of service bulletins and safety alerts, you can ask them to perform the work and they will do it and at a reasonable price. If you are a person who doesn't want to worry about the car and just wants to bring it to a service shop that is proactive about repairs... then sometimes they will catch stuff and sometimes they won't.