What is a hybrid wallet?
A hybrid wallet allows you to send and receive Bitcoins just like any other wallet. However, the Bitcoin private key which is required to send money is encrypted in your browser before it reaches our servers.
Therefore our servers only hold encrypted private keys and neither we nor anyone else can spend your Bitcoins. Only you.
Non-hybrid wallets are not safe.
Even seemingly reputable wallet providers or exchanges that have access to your private keys are taking risks with your money.
It only takes one rogue employee or experienced hacker with access to the naked keys and your Bitcoins are gone forever.
What about desktop clients?
Even experienced Bitcoin users have lost coins because they accidently deleted their wallet file on their personal computers.
StrongCoin takes care of offsite secure backups so you don't have to worry.