Amazing extension. It basically transformed my YouTube into something that doesn't look like it's aimed for 5 year olds with a chronic clicking addiction. It genuinely reminds me of old YouTube... you know, back when it actually worked. However, right now it seems like on most pages, especially if there are a lot of videos on screen, it takes a second to load all the thumbnails and titles. It makes sense as it's fetching data from the server(s). But it does mean that your internet should be somewhat decent, and so does your CPU. Keep those things in mind. Fortunately, you can quickly turn the extension on and off to test things out.