Is the Low-E argon glass worth it over clear double glazing?

Yes for most homes. The Low-E coating and argon fill reduce heat loss and summer solar gain compared with clear double glazing, which matters on a large glazed door.

Does it come with the screen and lock?

The listing includes the screen and the ASSA 2002 Connect lock case. Confirm with the seller whether handles and cylinders are included, since these are often sold separately.

What size opening does it need?

It is a 72-inch wide, 80-inch high leaf in a 4-9/16-inch jamb. Frame the rough opening to the jamb dimensions plus shimming space, and check the 41.3-inch frame depth figure against your wall.

Can I fit this myself?

A wide glazed door is heavy and awkward. Two people with framing experience can hang it, but a professional fitter is safer for a door this size.

Which way does it open?

It is a left-hand door, so the hinges sit on the left as viewed from outside. Check your opening before ordering, as reversing it is not straightforward.