It is claimed that DPoS is more efficient than PoS. In regular proof of stake systems it may be unprofitable for many owners of small and medium wallets to stake unless transaction fees are set to a relatively high level, whereas in delegated proof of stake the enhanced efficiency allows for low fees, fast confirmations and increased profitability. It also means that most people can use a lightweight wallet without sacrificing their PoS staking profits.
Critics of DPoS argue that, by concentrating the role of validation in a smaller number of hands, it is less decentralized and less resilient. It also suffers from the same problem which any democratic system suffers from: voter apathy. If most regular users fail to vote then there may be a tendency for the network to be controlled by large stake holders who can simply vote for themselves.