Nothing wrong with Mustang or that model that I know of. Be sure to read the previuos posts about buying and checking out your first skidsteer. Check pins for wear/slop, look for signs that it has been greased, service records are a plus, does it start easy when stone cold?
drive straight? not creep when parked running? boom and bucket don't leak down if left inthe air for 15mins or so.
Ken