Yes, I have to share that opinion too, BTSync offers a near-zero learning curve, at least for the basics. RSync is a very potent application no doubt about that, but it is not for my granma for instance, not even my little brother. So the user adaption on the utilty is a very important matter. With respect to the mechanism that BTSync uses to detect and propagate file changes. The time taken to re-calculate the chunks of the changed file is dependent on the size of it right?. How much would that be for 1GByte, lets say?