|I've never come across this software either. |
I don't think I would pay for it myself though. Plenty of free offerings which are tried and proven.
Interesting though to read through the first link Derek provided where a rep has come on to defend the software and say they are a bunch of microsoft gold certified developers then further down the page defend the softwares functionality by saying it only deletes old and broken files or removing what's left of uninstalled software.
It seems legit enough to me but would still stick with what I am familiar with personally.