I would not suggest them since you often hear of stupid things they do so that one gets the impression they are unable to code. Which is a prerequisit to be trustworthy.

Better use something like electrum portable. Backup your wallet files completely (if you don't use portable version you need to backup the wallet file too) on a second harddrive and in an encrypted truecrypt volume in the cloud. Additionally back up the seed mnemonic. Then your coins should be safe.