One of my machines is a Bernina Bernette and I've never had a problem with it....one of the first biggest projects I made on it was a very large rag quilt and it did well....too, it is light enough to take to class. It is not a expensive machine and I don't expect it to last forever but it seems to fit my need at the moment.
I bought a Singer Athena 1200 at a thrift shop; have cleaned it up and will try it out on my next rag quilt.