I use grabit myself and have managed to set it up so it works at decent speeds. One of the other programs are however just a little more convenient. You set up the file to download and set up 2 servers with max connections etc. Then you can set it up so that it downloads the files from both servers at once, instead of having to select files individually to download from another server. This way you can set a huge queue to download without having to select half the files to download from one and other half to download from other. More convenient, just a pity none of the other programs work as well as grabit does!