Yup I have mustangs and to be honest I'm not impressed really!
I have had the Arenas for years and they were brilliant but when they gave up I decided to replace them with the larger motored Mustangs and they have been a problem from the start, really loud, heavy and quick to overheat ( I clip up to 60 horses in a winter so they need to be reliable), I have since bought a set of Wolsley Swans and so far I am happy with them!