Pros of having EDS:
Environmental friendly
Cons of having EDS:
Error prone. Once set wrong directions or service number,
everything will be screwed.
Once EDS is corrupted, any destination and svc number won't be
displayed.
Pros of desto:
Less/no error of showing correct direction for side desto(unless BC
continue to flip flop it before doing return trip)
Correct service number for front desto
Cons of desto:
While craving for the shapes, there might release some of harmful
gases out.
