Personally I enjoy my bitcoin Trezor and use it to store about 10 BTC, the rest is stored offline in paper wallets. Also have some in my phone as well.
Thing is to keep small amounts in many places to reduce chances of anything to happen, at least to a consistent part of your capital.
Trezor? Is that an online wallet?
Its a hardware wallet ->
https://www.bitcointrezor.com/Well me I use Electrum. Fast, easy, intuitive. And the most important part: you get your private keys ^^
You can use trezor with electrum so your private keys would be safe even if your computer was infected. Pretty neat things these hardware wallets.