I noticed a check-box option in the advanced section for "Faster Conversions (experimental)". What is that all about? How much faster is it and what do I risk by choosing it? Is that a feature that will leave the experimental realm and become a full-fledged feature? I think it's great that your focus is on quality, but sacrificing so much speed is a rather large trade-off. Might it be possible to have a checkbox instead for "slower, higher quality conversions (use for damaged files, or files that produce errors during normal conversions)"?

Great product. Keep up the good work.