I have tried it. retail 1.1.
Worked for me.
Seems equal or better to dvd2one and on the movie I did, it filled the entire disc ,which instantdvd seems to have a bug with.
Like all new softs it has bugs which need sorting out.
Some people are having a few problems with it, but the author is working hard to fix them all.
Competition is good for the consumer (us! lol) so its a win win situation.