I split horizontal, a good sized load that filled a 5 1/2'x10' barge box with 3' sides about level full loose thrown a couple weeks ago. Wood was in trailer, had splitter right next to it, then barge box was on other side. Worked well, but not saying faster than vertical splitting next to a pile. I did not have anything bigger than 24" rounds, most were smaller. To me if i have to pick up wood to load on splitter I won't do it. I would rather roll over and split. Even with a lift I don't see as much advantage. Depends how you stack your wood also. Mine goes in wagons or in a steel "crates" I made. I don't mind throwing splits up in wagon versus picking up large rounds.