I've had this machine for about ten years and am still in love with it. I have not had a single problem in all of that time.
Some of the best features are the large throat area, the sky-high spring-loaded presser foot (a second tier of lift will help you get over a rolled-up quilt or several layers of denim), the horizontal bobbin with clear cover so you can see how much bobbin thread is left, the Accu-feed system, the good lighting, the automatic needle threader, the lockstitch, the automatic scissors, and the multitude of feet that came with it.
It will take generic snap-on or low-shank feet available nearly anywhere, and this is really handy if you lose a zipper foot, for instance. The threading guide is clearly marked, both for the top thread and the bobbin. The seam guide is clearly marked, as well.
This machine does have a couple of disadvantages if it is to be your only machine.
Mainly, it is rather heavy for taking to class, and it does not have a free-arm. (I'm seventy and don't like to carry that kind of weight, so I use a smaller free-arm machine for classes.) You may only be able to find this model as a used machine or as a new one from an internet seller now.
All in all, it's a wonderful, versatile machine, and it is far less expensive than many other brands are, while being very durable and trouble-free.