my sister and i both have the 770 and love it. it has been so easy to learn, does a great stitch and there are so many free designs. i've been doing my blue jeans and using a quilting motif to do the centers of the double weddign ring i'm doing for my mom. she's been doing tshirts for her grandbaby. the only thing that was a problem was the automatic needle threader. my sisters came off in the box. and the company wants you to send it in to get it put back on. mine i was very careful unpacking and got it set up with the needle threader. never could get it to work and finally just took it off. the machine is very easy to thread without it. in fact, i usually just keep the metallic needle in it for everything. the metallic needle has a larger eye and is easy to thread.
but overall we love our machines and i would buy another one.