Some photos of the boxset and first volume....
Both of them at the Garden City JB Hifi (I only saw the one copy of the boxset, which I bought, but they might have more somewhere).
Fortunately it has all 26 episodes on it, as the total running time originally noted for this release didn't sound like it was all 26.
The box set is just four regular volumes inside that box above (therefore, no extra/special features).
Since one is exactly the same as the single volume that's on sale, we get to see what the other three volumes should be if they all get released.
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If internet streaming and apple store downloads weren't so common now, I'd be quite excited about having a DVD copy of a cartoon series that hasn't yet finished airing on American TVs.