Seven months ago I used UPakWeShip, 28 boxes (some of which were regular file folder boxes from Office Depot, some larger, some were cased guitars but counted as a "box" (!) -- 100 cubic feet, and apparently they didn't care about the weight limit (!) for $1,300 from Austin Texas to just outside of London.
I had to deliver the boxes myself to the Austin warehouse, where they shrinkwrapped my things onto two pallets and trucked them to Houston port for shipment. But the other end was a direct delivery to the place I was at. Took just under two months, shipped July 17 I think, was delivered to the door around September 10.
Only one glass pane of a pretty replaceable picture frame was broken and that was my only packing failure, but everything else was great. Was very happy with the service.