Pfaff are a good make with a good rep. Stitch quality is excellent. Not hard to use, but...

Not all machines suit everyone, and Pfaff don't really suit me. When I was looking I went for my HV Lily instead, as it just fitted me better. Read the manual carefully, and try to get some lessons specific to that machine and machine embroidery in particular.

Here's a little more about it: http://www.sews.com/machines/pfaff/cre_7550.html