Ah yes, have been suggesting that versions of uprights/Hi-pulls since I've been coming on GB. Excellent delt movement, with the elbows out wider that normal. More friendly to the wrist, elbow and shoulder joints themselves. Can work up to very heavy DB's, treating this movement more like a regular Hi-pull, if so inclined. 120-150lbs not that uncommon, for regular sets. Just remember not to have the DB too far out from the front of the body, but near the body at all times. Too far out can place more strain and stress on the shoulder joints. May be one of the reasons some guy's have a problem when doing regular BB up-right rows.
Also one arm lateral raises, free hand gripping a support, for better focus on the delts themselves. Can also do front raises and bent over rear DB raises (excellent for the posterior/rear delts and portions of the traps), one arm at a time.
Both exercises have been a personal favorite of mine for quite a number of years. Glad someone has stumbled upon the benefits of both.
Mate...i did not just "stumble" on anything