Mine has been 100% reliable so far. A doddle to set up and I highly recommend it. Its transformed my car, even just at bpu I found I really needed it!
The issue with the files was just with some obscure 'smoothing' value being set when it probably should not, with it set the reading rltc gets might not be as good as it could be - this is just a configuration thing, not a hardware unreliability.
don't disregard the digi adjuster, it's really nice and allows you to tweak the settings without getting the laptop out all the time... It gives nice visual feedback of what the unit is doing too, like a graph of the cuts it is making to keep traction, I like that display a lot.
there are no issues with rltc and anything else, turbo timers included!