Looking at the evidence from research - ref Keith Tabers article Chemical bonding - 

http://www.rsc.org/education/eic/issues/2011May/ChemicalBonding.asp

Emphasise if introduced in this way it aviods some of the issues a bit later.

Usefulness of approach = pre 16 structure and bonding face to face course slide 39

http://www.rsc.org/eic/2014/03/chemical-bonding-misconceptions-electrostatics

Possible MM - use of character conversation to introdcue some of the ideas here.