I use them as my backup backup provider. Crazy cheap, my bill was like $1.50 for a month. Their backup command line tool is pretty solid also. I would definitely use them if you need a new backup provider.

Proton is great for leaving the Google sphere of products. Such similar products. I even hooked a domain up to mine by chance i ever switch mail provider i can use the same address.

Really great service with loads of mirrors!