There's no report that I know of that only pulls orders with notes. Though, the single sale order listing will display notes for all orders that match your parameters.
It might be worthwhile to check to see if there are any shared reports that meet your needs?
We tell our staff to enter all feedback into CSIs. We have a Category for Customer Response which breaks down into six Activity Types which can then be tied to a performance or package if appropriate. We have activity types for positive feedback or complaints about: Website, Performances, or General (could be anything from interactions with staff to cleanliness of the building or anything really!).
This is 100% reportable and you can assign Actions to another staff member if followup is required for any reason. It has worked really well for us.