I tried the program out before I bought it. My trial with it was so convincing and effective that I bought it, almost right away. Before I tried Prism Video Converter Software, I tried Movavi's Video Converter software. I've got to say that Movavi has shot themselves in the foot with their free software trial as the converted video in the Movavi trial had a large translucent band that goes across the screen, effectively making it hard to assess the quality of Movavi's video conversion. What I did see in Movavi's free-trial, besides the translucent band with Movavi's name being superimposed over the video I was converting, was, in the background, a rather grainy looking, low quality version of the video I was converting. NCH's free-trial, on the other hand, rather than placing a translucent band across the converted video with the company's name on it, used the more effective method of restricting some of the more advanced capabilities of the software, while still offering the basic video conversion abilities that I was interested in the program for. I'm not a videographer or a video expert, by any means, but to my consumer eyes, the quality of the converted video is stunning. The converted video, being cut down data-wise by leaps and bounds, to my eyes, still looks about as good as the video that, before compression, required gigabytes of space to store. Short videos of between 5-12 minutes that took up anywhere from 7-12 GBs of storage space were compressed down to videos that require, in some cases, less than 100 megabytes of data with the rest being converted to videos requiring less than 200 MBs of data. To me, the quality of the compressed video is superb and the sound quality of the converted videos is, also, excellent. I was very pleasantly surprised with the results of this software. I'm using a rather old Mac Pro with 128 GBs of RAM, macOS Mojave (10.14.6) with an AMD Radeon RX 580 GPU. I would suggest trying out their software with their free downloads from the NCH website. That way, you have nothing to lose if it doesn't work for you and the chance to be highly satisfied, like I am, with the results that Prism Video Converter Software can provide.