Logistics pros are a lot like the offensive line on a football team: at their best, you know they are doing a great job, but their numbers never get called by television announcers. When they do talk line, it’s usually because someone committed a penalty or allowed a blitzing safety in for a sack. When the quarterback isn’t pressured and there are great running lanes, the line rarely gets mentioned. It’s kind of the same for 3PLs.
The goal of your 3PL should be to avoid those issues and remain unseen and unremarked on by end users.