Good at recovering deleted files, i.e. files that are still on the drive, but not written over or identified by the file directory. As far as recovering real data, this program is worthless. They show you what metadata still remains on the drive, so you think you can recover it, but their software does not recover or rebuild corrupt files. They will even tell you that when you contact tech support and try to figure out why it looks like all your files have transferred, but none of them will open properly. This software is deceptive.
It has many poweful functions, can compete with Easyrecovery on Windows, very practical, high success rate, I recovered a 640G harddisk and 90% of recovered files is good, 10% of recovered files can not be opened.
This is a well known data recovery software on the Mac, very powerful, I have used it to recovery my important data twice.