My cousin traded one of her Singer 221 (featherweight) machines for a Bernina 830...I feel she got the best end of the deal :-) After trying hers, I decided I "had" to have one. It's certainly one of the best...only wish there'd been a Bernina dealer in my area back in the '70s. My cousin then gave me the book "Know Your Bernina" by Jackie Dodson which I believe is out of print but might be available on eBay or used book stores. After reading several chapters I decided I "had" to have the 1130 and I bought one on eBay.
The Bernina machines are excellent Swiss quality and I highly recommend them. From what I understand the only negative is that repairs are pricey. I don't think one can go wrong with one of the older Bernina machines!
Pat B in Indiana