I bought one of the originals from QVC about 14 years ago...it does limescale no problem, as for greasy cookers/surfaces it's like the proverbial hot knife through butter...it cost about £250 back then, but given the amount it's saved over all these years on bleach/ disinfectant and window cleaner, not to mention elbow grease, I'd say it's more than paid for itself and wouldn't hesitate to replace it when it gives up the ghost.