I like it because it’s self seating: meaning if I bang it, bump it, nudge it, or are otherwise misaligned, it just grows crooked or I only have to shove it down and it doesn’t fail. I also, as others have said, use it for top working trunks.
I have had good enough luck with apples with cleft grafts to not bother with anything else. Splice is probably equally easy but I honestly find wrapping field grafts kind of a hassle so I think cleft is easier to hold and wrap at the same time.