Hi Carol - I loved my 7700, but upgraded to the 8900 to get the better (taller - 9mm) lettering for projects with kids. The downside if you have had the 7700 is that your extra AccuFeed presser feet (1/4", SID, Open Toe) don't fit the new 9mm machine. If you use those (I really do) you have to buy all new ones to fit the new style and wider, AcuFeed on the 8900. Just an unanticipated expense for me. I do love the easier 1/4" seams on the 8900, and everything else I've tried is at least as good as the 7700. I love that I can use the magnifier for my tired eyes, and the remote foot-powered thread cutter makes me feel so efficient. (Those were anticipated extra expenses!)
Tecla in Kingston, WA