Thanks! We're certainly grateful for all of the input and feedback we received while designing this thing (especially from our beta users who came through time

Thanks! We're certainly grateful for all of the input and feedback we received while designing this thing (especially from our beta users who came through time and time again, giving us countless security use cases and providing feedback on our prototype implementations). I will point out though that what you described looks like an ACL system with groups (akin to unix permissions), and we think our Security Rules system is actually quite a bit more powerful than that (you could easily build ACL / groups on top of it, but you can build lots of other models too). :-)