I've also been so lucky as to have been able to play with it for a while now, and can corroborate that it's super useful. It's not just a better alternative to

I've also been so lucky as to have been able to play with it for a while now, and can corroborate that it's super useful. It's not just a better alternative to something else; it's a whole new category of debugging tools, in the sense that there were problems that were pretty hard to debug and are much easier now that Replay is available.