There is a huge company around these parts that only uses Scotch Lock wire nuts. From what I heard, they are less expensive and they order them in bulk. I have never really cared that much for the soft Scotch Lock wire nuts because they seem to be only to be able to be used effectively once most of the time. I also have run across them sometimes not backing off a joint and got a 277 zap because of it one time when my kleins dug through one when I gave it a squeese which sometimes works when you can't back them off. Personally, I much prefer wing type wire nuts, but I was wondering if anyone out there had an opinion on this.