We have the Pfaff Grandquilter which is almost a twin. We love ours, but we have had some tension issues. As a matter of fact, I am procrastinating right now because there is a quilt on the frame that needs to be finished but I'm having trouble with the thread breaking. I love it when it's working. I can't imagine using and getting good results without the frame and stitch regulator, though.
Darren