They are quite noisy and heavy compared to the more recent clippers of today, but very powerful. They are classed as a heavy duty machine and mainly used by professionals.
There are some parts now, which as far as I am aware, are unavailable for the Mustang. Best tip, is keep the rear mounted air filter spotless (take it out and hold it up to the light.if you cant see through it, clean it thoroughly) They are very prone to overheating, so oil your blades well and keep your filter clean at all times.