1.Advantages:

Has a strong development team. The founder has experience collaborating on other successful projects like Ethereum and BitShares.

The first blockchain has more than one layer (settlement layer and computing layer).
There is no limit on scalability. Blockchain is capable of processing any number of transactions.

Cheap and fast transactions.
Cardano's consensus mechanism is more environmentally friendly and cheaper, as well as fair compared to older blockchains.

2.Defect:

The claims made by Cardano blockchain have yet to be proven, some parts of the network are still under development.

Issues with Daedalus - Cardano's official wallet such as the inability to synchronize blocks, lack of connectivity to the network, and transactions to the network