Great machine for general repair and sewing. Has most popular stitches. While there are some plastic covers, the Base and Riser are cast metal. Thread tension is easy to set and forget. Easy to thread and wind bobbins. The bobbin Case is not removable, so you must put the bobbin back in the case in the machine. A little tricky on how to pull the thread out of bobbin and exit through the case. But the Instructions are a big help. After the first time, pretty simple. Sews Great!