I wrote the original version several years ago. It was purely for myself, to automate the way I was doing the backups at the time. I also threw together a website and put it online, just because and with no hope that something this simple would be in demand. Then went on doing other things like having kids and what not. Fast forward to 2012 and there's a couple of thousand people on the mailing list and a trickle of emails asking when an update would come out. So I sat down and did a proper rewrite. I thought it would take 2-3 months, but it took almost a year. And a half. The breadcrumbs of the process are over on the /wip page [1]. You might've seen it as it was on HN some time ago.
The app is notable for three things - (1) it has a single, simple purpose (2) it is light and very fast and (3) it has an excellent UI.
Also of some interest - I ran a 12-month long beta. Started with just 100 people testing private builds for 6 months and then moved on to a public beta for another 6, altogether yielding about 15,000 installs. If there's a single takeaway from the project so far - a beta this long is incredible. It helps shaping the feature set like nothing else and it flushes the most obscure bugs that no formal QA could ever find.
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By the way of introduction - I come from the system programming background. I spent several years writing firmware for network appliances, I wrote a P2P VPN system from scratch and I generally prefer C to Java if you know what I mean. I also get a major kick from doing visual design for my projects and got 2000 followers on Dribbble to prove it :) ---
In any case, there you have it - my take on simple backup software. Let me know what you think. Thanks! ---
[1] http://bvckup2.com/wip