This, a thousand times this. The original broadcast had them air back to back. It's the correct and proper way to watch it.
Of course, if you want the 100% authentic experience of watching those two episodes back to back, try avoiding all things Madoka for a full month whilst endlessly speculating and rewatching episodes to try and catch the ending while under the impending sense of doom that the final episodes may
never air.
Don't do that of course. The delay was a killer and we want to see your reaction sooner rather than later.