I use it. But you must be careful to set your parameters. If one just uses the default settings for rectifications, you'll just get what answers the defaults give. I do not rely on it for all rectifications - just those where the time frames are very wide and I want some things to think about.
Where it excels really is not in rectification, but in research.
Thanks for responding Frank.
Could you perhaps explain a bit about how you use it for research?