I have had my machine for about 4 years and cannot believe the difference it has made in my quilting experience! Stitch in the ditch is a dream with the accufeed, free motion quilting is easier because of the larger than standard harp (although the 7700 is larger) I have no tension problems with this machine. I love the thread cutter, separate motor for bobbin winding, needle up-down, faster than average speed with speed control for those times when I want to slow down, pressure control for the pressure foot, great accessory prices and lots of great stitches. The knee lift is a gem for applique turns and string piecing. Of course I would love the Horizon, but really can not imagine giving up a machine that works as well as my 6600P :o)