Well Parle G biscuits are one of the most oldest and greatest biscuits I am eating apart from other biscuits sure it is not crunchier.
But when it comes to Deeping the biscuit into water/tea/coffee or milk it is the only one that can disolve into the liquid tgat easily and can give best taste.
It is also popular in India because it is much cheaper as conpare to other brand biscuit. I still eat Parle G while I am having my tea or coffee. My final verdict is must have biscuut in every house.