Jaxx is a very good Wallet to store your Bitcoin and altcoin and also help you to convert and hold the crypto which is currently available in very few exchange for example GNT. For Further info to convert and hold GNT Read my Post How to Buy and Hold GNT using Jaxx Wallet.
One thing which quite impresses me about Jaxx is their Privacy Policy, they do not store any of your data not even ask you for the registration and provide complete control to your digital asset with 12 word Masterseed to help user to manage private keys to Bitcoin and altcoin.
Suppose that you are using Jaxx on android device and you lost your phone then you can you can get access to your digital asset with 12 word materseed. you can install chrome extension of Jaxx wallet and take the control of your wallet with 12 Word Materseed also called as Backup Phrase. It is always recommended from my side always lock your Jaxx wallet with security pin.
Disclaimer-: This post is just my user experience with Jaxx wallet. Do your own study before using any wallet check out it is open source or not, its authenticity and other user experience over the Internet.