You should do a search, its been covered alot, but anyway I haven't used 1.5, but I have had a chance to spin on the 1.0 version, it worked while I was on, but I know all the versions have many problems, I HIGHLY surgest checking out Serato Scratch Live, I haven't used it but heard many times over its a far superior product, also check for FS2.0, but I'd still go for SSL.