Opinions vary. Some don't like them, I'm one of the ones who do. The biggest issue is tthe 620 series on up used nylon gears and the gears are starting to fail on them. Replacement sets are available on Ebay and are relatively inexpensive. As long as the gears are still good, yes. If not then it becomes a judgement call on your part. Touch & Sews are great machines. They're descended from the 400 series and 500 series Rocketeers. They're very similar inside other than the automatic bobbin winders. To get the full benefit from the machine you need a copy of the owners manual, preferably printed and right next to you as you work. They are capable of a lot but are not intuitive to use.
Rodney