There are 2 general types of machines, ones that take dies and ones that are electronic. Again, in general, if you are cutting lots and lots of identical pieces the die cutting machines, like the Sizzix machines are a good choice. If, however, you are cutting lots of individual shapes, such as leaves, flowers etc. for applique, then the electronic ones may be a good choice. The die machines can cut multiple layers at one time, where the electronic ones cut only one. If your mom is doing a grandmother's flower garden, then she is cutting lots and lots of hexagons. I would take a look at the Accuquilt GO machines which are geared specifically toward quilters. The Go Big is a die cut machine that is electric, so easy to use.
http://www.accuquilt.com/shop/fabric...-compared.html