I've had my l660 for almost 3 years now. I absolutely love it! While I've had a few problems with it, it has, unfortunately, always been "operator error". I don't find the manual to be very helpful but there is a yahoo group for 6600 owners. I have found it to be a wonderful source of help and info. There is also an extensive database so you can research a topic if you like. The 6600 was TOL when I bought it. I usually go cheaper when I buy but not this time. I have not regretted my purchase once and I sew almost every single day. So my vote is YES YES YES!