Powerlet, hella, and din (different names for the same configuration of plugs and sockets) are made to a higher set of tolerances and specs than our cigarette lighter power outlets. I've never verified this, but I did read that somewhere - probably wikipedia or the original Powerlet website.
I prefer this system over the alternatives (SAE and cigarette lighter), but each has its uses. The SAE connection is for cord ends and works superbly for battery tenders and similar uses. I use coax cord ends for my heated gear, powerlet for their USB plug (2 usb ports) and gps (I installed a powerlet male plug on the end of the Garmin harness).
Wire management is a personal thing, and choosing the appropriate connection is an important component of achieving this.