I've used it for years and have never had a problem. However, since myp2p has went offline it can be hard to find streams.
Its very good, safe to use and the streams on there are a lot more stable because they are generally broadcast from a proper server rather than someones computer like the internet based ones. Since myp2p has went down though I've found it harder to find Sopcast links, can always use the program to look manually but can take ages.