Back in Time vs Timevault vs Flyback

There are a number of options available for taking snapshots of your system. The three which seem to be the best, at least from an ex-Apple users perspective are Back-in-Time , Flyback and TimeVault. I wish one of them was included in the default distribution, but I guess that would mean chosing one project and alienating another project. Since Back-in-Time seems to be the newer kid on the block, I have chosen it for my own machine, but would love to hear about users experiencs with any of the three options. While you at it, you might want to compare them to Apple's Time Machine.

[caption id="attachment_1031" align="alignleft" width="300" caption="Flyback - the lightweight alternative?"][/caption]