I had the previous beta version on one machine and wasn't too thrilled with it. It did its job, but I had liked the Copernic interface better.
This new version is a big improvement. The interface is very usable now and I really like the desktop search bar that you can add to your toolbar. I'm going to have to play with this one a bit more, but so far it's doing a great job.
The English version I use even went through my Japanese and Chinese files and indexed them. I can search with any of these languages as well. I don't recall an of the other desktop searches being able to do that.