Undoubtedly Slush

Most users would probably say the official Sui Wallet is the best, mainly because it's developed by Mysten Labs (the creators of Sui) and offers seamless integration. It lets you send and receive SUI and other tokens, stake your SUI directly to validators, view your NFTs, connect to various dApps, and manage multiple accounts easily. It's generally stable and well-supported.

Many would say the official Sui Wallet is the best due to its direct support from Mysten Labs and robust feature set. It allows you to easily send and receive SUI and other tokens, manage your NFTs, stake your SUI with validators, connect to various dApps, and view your transaction history and owned objects. It's generally the most straightforward for full ecosystem interaction.