I have the Expression 4.0 and I have an old Pfaff 7550. Loved that machine. My new one was at the factory the first year more than it was in my house. I don't know if it was a lemon or not, but I have learned that you just can't sew fast on it. The needle threader is very easy to break and when taking the bobbin area apart for cleaning be careful or the thread cutter part underneath will fall in a bottomless pit under the machine and can't be retrieved at home. After a new bobbin holder and numerous needle threader replacements I have finally learned to sew on it. But they just don't make the new ones like the old ones.