I have been enjoying this software for the past couple years, but it sacrifices efficiency for simplicity, while simplicity is good, efficiency is a must, I myself have used this since 2009, and loved it for the first year, then, came upgrading of my computer, resetting it, unfortunately Hamachi's back up system wasn't as simple as the program itself(I was honestly surprised) in the name of "User Control" this, while good is highly inefficient in itself. My main problem was with it's "User Control" which prevents any sort of constant gaming, while you are in control of your networks, this is also a major problem, what if your system crashes? what if you need to do an entire reboot? Hamachi prevents any sort of simple and reliable back-up system in the name of "User control" After writing all of this, I think it's time to wrap up this review.