I kept using blockchain as well as i just have small amount of bitcoin as i kept buying and cashing out for my needs. those that I send to my armoury wallet are the ones I just save but even that I still have less than 0.5 btc to that offline wallet.
Blockchain.info holds your encrypted wallet, and your password decrypts it. Blockchain.info truly is the safest online wallet, because they don't have access to your coins, like coinbase.
I personally user coinbase though, because I gold large sums of bitcoin in either investments or on my cold wallet.
Coinbase controls your private keys which means that they have full access to your coins.