It's not recommended here:
http://www.techsupportalert.com/cont...g-torrents.htm
Limewire has suffered over the years from accusations of virus spreading and the provision of poor quality files and fakes. But things change, and for all I know it may be perfectly satisfactory now. This has to be a personal decision, but I'd never use it and I don't like the combination of both a free and a paid service.