The M-FiL 400 offers a solid blend of stability, power, comfort and maneuverability. The open string pattern (16/19) provides a lively response and offers easy access to spin. Intermediate level players will find plenty of pace on serves and groundstrokes with this racquet. At net the racquet feels very mobile, yet remains solid and stable at impact. We found enough pop to get high volleys away, while also enjoying good depth on shots when stretched wide or caught deep around the service line. With its generous sweetspot and comfort from all areas of the court, the M-FiL 400 makes a great doubles stick and a solid choice for all court players. Players at the 3.5 to 4.5 level looking for a maneuverable racquet with a solid feel, some nice pop and plenty of control from spin generation should definitely take this one for a demo.