I like mine too. I think the biggest thing is you NEED the manual for those machines. They're not a real intuitive machine. My 628(? I don't quite remember the last number) is pretty complicated to setup the decorative stitches. What I like though is it has a built-in camstack that you can use in combination with the disks for even more stitch patterns.
Monopas-how's your water heater nightmare going? If it's leaking out of the tank, your tank is rusted thru and it will need replaced. If it's leaking at one of the fittings there might be hope. Sending you a PM.
Rodney