Every time I tried to do anything useful, it crashed, though that could have to do with my high bitrate 4k footage origin. While attempting to use some tools I noticed the quality of the footage was degraded around the actual pixels where masks normally would be. I really just don't think tools like this are ready for mainstream professional use, but that's just my opinion. I still LOVE the idea though, and I hope this company keeps developing it, could be great one day. I HATE working with web-based tools though, wish they just produced a proper application.