I have a Fabric Mover for my Viking Sapphire. I've had it for 2 years and used it about 3 hours total. Hate it!! The quilting area is about 9 x 8 or so then you have to move the quilt again then again. I cannot FMQ; thought this would help--nope!! Very limited in area. I see others have had success with theirs. Mine is under the bed--I stub my toes on it every night to remind myself that I don't need every gadget that comes along LOL. I don't know where Morgantown Pa is but if you're near me, you're welcome to come try mine (if I can figure out how to put it on the machine after all this time). It does have a stitch regulator.
Please try it out for yourself before you commit to the purchase. I watched all the videos and the lady was smiling and having a great time. Not me--the air was blue with cuss words when I tried it!!