A few things:
1). Currently if the product is not in Registered (Paid) mode it won't work at all. In a conversation with Bret (the Developer), he intimated that things may change up in the future, but for now don't use it without getting a license.
2). When installed WAR will create both a service as well as the Tray application. RAM use varied from 14-24K for both with little CPU impact.
3). Although it seems that only one SafeZone folder can be created, the user can specify where they want to put it.
The one thing that I really appreciated was the protection afforded versus CryptoFortress. So many of these specific Antiransomware applications will make it seem like the user is fully protected when actually they only mean the Documents folders (It always struck me as being deceptive in the extreme). And the Fortress stopping ability wasn't due to any "dumb" detection, as my encryptor (which includes a similar mechanism) is as Zero Day as one can get yet it also was prevented from doing harm.
I did feel a bit guilty (and thus my choice of the backing song) about searching for something that would bypass WAR, but often a person must call a Spade a Spade.