It is really good, I feel very confident using it and I have been using it for a long time. Just now I changed my keys and I noticed that there are problems to import the keys, some say that it is win 7, but there is a little problem that we must correct there.
Secure Hive Wallet Extension
Hive Keychain is an extension for accessing Hive-enabled distributed applications, or 'dApps' in your Chromium or Firefox browser
The extension injects the Hive Keychain API into every website's javascript context, so that dApps can read from the blockchain
Hive Keychain also lets the user create and manage their own identities, so when a dApp wants to perform a transaction and write to the blockchain, the user gets a secure interface to review the transaction, before approving or rejecting it