I have the B&W Companion and am very happy with it. With the b&W Turn Over Ball Hitch, when removed you have an unobstructed pick up bed - no rails or brackets to trip over or hang up a load.
It's manufactured in two pieces, each weighing ~75 pounds, disassembles by pulling two pins and lifting the two handles. Remove 4 nuts with a 15/16" socket and one 1/2" bolt using a 3/4" socket and off it comes. There are several adjustments fore and aft as well as up and down. Adding a Blue Ox Bed Saver requires that you drill 4 holes, two in each upright. The Bed Saver adds about 20 pounds and makes it somewhat ungainly to handle the base. It takes me less then 15 minutes to install and less then 10 to remove (add a few minutes if the Bed Saver is bolted on). The time difference is in torquing the fasteners.
There is one grease fitting on the underside and the jaws do need to be manually lubed along with the two pivots on the risers.
You should replace the supplied half inch bolt with a Grade 8 (mine was a Gr2!! ) and add some heavy duty washers under the U-bolt nuts (they are 5/8" U-bolts) to prevent galling.
My 5er - total weight, ~12,000 pounds ready to travel with a 22-2300 pound pin weight.
After 3 years use, mine still looks almost new