I bought this to clean motorcycle engine parts having borrowed a friend's cleaner, bought from RS electronics, and pleased to find it was obviously the same make underneath the logo sticker. It degreased engine components and took off the majority of carbon build up on pistons. The digital model is more expensive and would recommend the knob version - just as good. The 3 lire model is a good compromise based on size and amount of cleaning liquid needed to fill it. Overall a good addition to the home mechanics workshop.