I think under most use a HF or Northern Tool or any of the other cheaper cost QH's are fine.
I've got a CAT I Northern Tool hitch that I've bent. Where the lower hooks are fastened to the frame they used 1/4" plate and it's not boxed in. The hitch bent laterally. I think I bent it using a BB but not sure. The higher end QH's are built stronger in this area and are boxed. Is that worth the extra cost?? Depends on how hard you are gonna use it.
As for the value of having one. It's a no brainer to me. Modify any attachments that need it to fit the QH you buy and you'll rarely take it off.
I change rear attachments very frequently so get a lot of use out of the QH. Yesterday I picked up and moved a gooseneck trailer with the ball I mounted to the top of my QH. Then picked up a 3pt mounted 300 gallon water tank used to sprinkle the road for dust control and dumped a load of water. Then picked up a ballast box and moved some heavy rocks with the FEL. All without getting off the tractor or using a single pin or telescoping stabilizers or any of the other "solutions". Again,, it's a no brainer if you use your 3pt a lot.