What most people are worried about with shared or open priced negotiation is that they will be disadvantaged by the Agent by them not giving both buyers fair opportunity to buy the property. 

With Openn Negotiation this simply can't happen once someone is a “Terms Accepted” buyer.

In all other methods (except auction) if there is more than one buyer, the buyers are kept in the dark with what exactly the other buyers price is. 

The major benefit for buyers with Openn Negotiation is that once registered, they can’t be kept in the dark about other buyer’s prices and have every opportunity to better the price and secure the property they have their heart set on.