From what I can remember, Xolox was originally designed for people with broadband connections. It works just fine with 5.6k, but some of Xolox's most useful features like downloading from multiple hoasts only helps if you have extra bandwidth. Xolox also does alot of bacground stuff like resending searches (can be turned off) and searching for additional hoasts for files you are already downloading. On the other hand, Xolox can really help with trying to download rare files.