Cool idea, but it's just way too fiddly to set up, and nowhere near reliable enough to actually use. It's far too spastic about suddenly changing contexts for no apparent reason — e.g. every time I plug in *any* USB device, it changes contexts, even though I only have *one* USB rule (which checks for a USB Ethernet adapter). Obviously it's a bug, and if it was the only one, I'd be willing to work around it until it's fixed, but unfortunately this is just one of many.
The "confidence" factor is hard to figure out — I have no idea how it decides that two conditions set to 60% confidence add up to 85% confidence (what voodoo math is going on here?). The inaccurate sliders don't help (why not just use text fields if you're going to track percentage values with one decimal point?), and there's basically no documentation either. None of this "confidence" crap should be exposed in the UI in the first place. Basically these are all problems the developer couldn't figure out, so they just left it up to the user to spend hours tweaking everything until it stops switching contexts at the wrong times.
In short, good luck actually getting this to do what you want without triggering false positives and causing more problems than it solves. Buggy underlying technology + terrible UI = lousy experience. I recommend not wasting your time trying to get this working.