Tony Cooper
It is not a clone tool. It does not replicate what the clone tool is capable of. You have to dick around with it to get it to use the area you want it to use which makes it less effective. Useful for some things, but not as effective, and certainly not easier to use.

Savageduck
It is not the equal of the PS clone tool, but it is there and when used judiciously it works. Once you have used it and understand when it works and when it doesn't, it is reasonably easy to work with. You just have to understand when you should move to PS as an external editor. For complex cloning, patching, and where the content aware features have to come into their own, LR cannot compete. However, for most editing it does just fine.