I've made a huge mistake buying this app and now I want to warn You not to do this. This is why:
1. All DVDFab programs are secured with erroneous activation launcher, which needs constant Internet connection to their servers. It works well when you use English locale setting in OS X, but may give strange results with other languages. It didn't worked with my locale at all. I couldn't activate my purchase and unlock DVDFab until I switched to English. This glitch is quite easy to workaround, but there are much worse problems with DVDFab...
2. They advertise DVDFab as "most full-featured and powerful video converter on Mac OS". Well, that just not true. Advertised OpenCL capability is simply not there, the same is with Nvidia CUDA. All you can count on is plain raw CPU encoding. And here you will get exactly the same performance as in all other media coders: Handbrake, Permute, iFFmpeg etc.). Most of them you will get for free.
3. When you pay for any DVDFab product, your licence is good FOR A YEAR. After that period you have to PAY AGAIN to use once bought app. And you may pay even when do not want to, because they make your payment renewing automatically!!! Without asking! If you will not switch off automatic renew on Avangate website (payment operator) or your card expire in the meantime, then you will be charged again!
4. They are not accepting refunds. Just that. Because not. And they're Chinese, so if you are unhappy customer (like me), then just say sayonara to your money.