i am so sad to see so many of you hating fleece and insisting it can not be quilted...i love using fleece and machine quilt it all the time. if you 'test' the fleece to see which direction has the most stretch then you can lay it out (i put it so the most stretch is side-to side..not top to bottom) smooth it WITH OUT STRETCHING it...if using batting put that next smoothed nicely,,,if no batt then the top...smoothed nicely...lots of basting now...either with pins or needle and thread...i thread baste...it is alot easier for me to use a needle and thread than closing and re=opening all those pins.
start in the center, work your way out to the sides, moving up...moving down as you go. one thing that helps is if you can (ease) the force of the pressure foot. my machine i can set for heavy fabrics or light fabrics...if you can relieve the pressure the foot puts on the sandwich it will go a bit better.