For the most part this extension works if you like backgrounds and other fun customize options. However, there are significant flaws. First off, for those that want the adblock function, it's subpar and easily detected by youtube, but that's an easy fix, just turn it off in the settings and use your normal. My issue is the lag and when opening videos the youtube ui vanishes (until I reload the page) and there's no setting on to cause that, again it appears when I reload. Otherwise I quite love it as it gives me the option to use my own images to make my web browsing experience really mine