If you want something done right, it's best done by yourself and not have it done by someone at a packing place which, IMO, is mostly run by incompetents.
I always do my packing for stuff I sell/ship...and I tend to always over-pack because I've seen how the parcel carriers can mistreat stuff...especially if it's too heavy for them to cleanly lift it.
That said...there are a lot of incompetent people (or they just don't care or want to waste their time), so they think the UPS store will do a better job, which isn't always the case...but like it was pointed out, I think they use the UPS store mainly for the insurance reasons.
I've taken packages to the UPS store and they'll sometimes get picky about the type of box or tape I used, but I tell them, not to worry, it's packed real good, though I know if they feel the packing looks inferior, they can refuse to insure it for you.
So...they bait you by offering their own packing with full coverage if anything happens.
The worst packing I ever saw was when I purchased a 75lb R-to-R deck from a music store and when it arrived via FedEx. the deck was inside a thin, single layer cardboard box with NO foam/wrap or ANYTHING!

Mind you, the deck was all busted up and it's front face completely sheared off...nothing was there. In the box were some of the broken pieces.
I came to the conclusion that it was probably poorly packed by the music store to begin with, and then FedEx must have dropped it or something, and then just scooped it up and put in a fresh box and delivered it.
The music store gave me a full refund and I shipped the mess back to them...but boy was I pissed, since I really wanted that deck!
My idea of well packed is so you can roll it down a flight of stairs and nothing will happen to it.
