Works as advertised, and it's significantly better than its predecessors since it uses firefox's native discard and reload methods. That means when you access a suspended tab it will go right back to the same scroll point on the page that you had it set to before. It's also smarter since it won't suspend pages playing media or that page with the important form that you were half-done filling out. Honestly it should be a standard feature of all modern browsers given how they tend to eat all your memory without it.