I have an older Bernina, and bless her little heart, she does EVERYTHING that I ask from her!! LOTS of quilting, huge numbers of muliple layers of vinyl and uphostery fabrics. No matter what the dealer said, she has taken every thread I have thrown at her and done the job requested.
I LOVE my machine!!
If your machine cannot take Coats and Clark, take it back! I know for a fact that these machines are made to take a beating.