Adblock works when they want it to work. It blocks ads. It even allows you to make custom blocks. BUT it has no means to import custom lists you have already built. Which mean you have to re-import each rule one by one on each installation. Extremely tedious. Especially when you can include Adblock's own lists with a simple two clicks. Import was a feature they REMOVED in a previous version, for no obvious reason except to make the software less useful. If you like the pre-built lists, great. If you want to roll your own, Beware.