Whatever shortcomings you'll find with AVS Video Editor won't matter because the software is available on a try-before-you-buy basis. Download it, edit with videos with it with no limitation (save for a watermark on your output videos), and you'll see how versatile and capable the application without spending any money.
Yet the support for free trials also makes it clear that quality is a hit or miss with AVS' product. Sometimes after all your hard work of putting the video together, selecting the right effects, and moving around the audio to sync it, AVS will produce a poor quality render. In other words, the final video will end up blurry and pixelated, no matter the quality of your source media. Other times everything works as advertised. For this issue, we found no clear pattern, even as we attempted to eliminate effects, source video formats, and the like. In short, finalizing videos with the AVS Video Editor often involves hoping your work (and time) won't be wasted.