After hearing a lot of praise for Arq here, I tried it out hoping it would become my new Windows backup solution. (I'm looking for a linux one too, but Arq doesn't do linux). But I was very underwhelmed. The user experience for browsing file versions in time was not really there. If I recall correctly, I could only browse by snapshot. And it was extremely slow for just a few gigabytes. The backup process didn't inspire confidence, I was never sure if something had interrupted it or what the status was.