In my experience they are not horrible, but I would not say they are great either. I would definitely not go out of my way to buy one. There are too many other brands of machine, whether new or used, that I would much rather purchase. I have read to many negatives in regards to their reliability and with so many used machines on the market, personally choose to avoid them.
I was very interested in them myself at one point, as I will usually go out of my way to buy things that are made in America, but after doing my homework I am glad I have avoided them. So, I would look elsewhere. Just my 2 cents.