Yes, there are glitches...but it's definitely not in beta. I use Minvo regularly and mostly I'm incredibly satisfied. I believe that the founders are honest, honorable folk that are trying to both honor their commitment to their LTD customers as well as to remain solvent (kind of important for us LTD customers(!))
Yes, Minvo can take awhile to process files...yes, there are glitches, but I'm definitely able to make it work...and I'm confident that it's only going to get better. It has been a great tool that I use all the time!