Did they ever work? No, seriously. I've had a couple of them and the few times I really could have used them I discovered that they represented the worst back

Did they ever work? No, seriously. I've had a couple of them and the few times I really could have used them I discovered that they represented the worst backup solution I've ever had the misfortune to deal with. Slow, very hard to use beyond their primary integration with the OS (which isn't good to begin with), there's really no good way to keep an eye on how they are doing (what's actually backed up, if it is still there) and the performance is worse than any hand rolled solution I've ever used. They never supported it properly in the first place and then it just meh'ed out of existence. I hope "the new Apple" is going to take software seriously.