I confess to not having heard of Silver Viscount, but I have heard of the Silver Reed knitting machines (actually I have an old Silver Reed typewriter and it was excellent). My suggestion for your friend is to ask if she can have a play on it, to she how it feels to her, and to make sure that she takes a range of different fabrics - lawn, calico, denim, quilt sandwich (if she quilts) and to try out various of the functions (I personally investigate the buttonhole stitch as well as straight, zig-zag and a couple of others just to see the capabilities).