I found them worthy competitors in the 70s through the early 90s. Their electric system made a level of sense during the late 70s energy crisis, and the complexity and unreliability of early slide in gas powered units gave them some room to stay in the competitive marketplace for a while longer.
Large, multi-truck, operations liked the simplicity and "idiot proof" nature of their systems, despite their lower performance.
A great deal of their success was also credited to their founder, Bill Bane, who was a charismatic speaker and very good writer of their newsletter. While his "anti-heat" propaganda and more than thinly veiled shots at the companies that I represented, as well as my father himself, would anger me, my father wouldn't let me say a bad word about him.
His view was this: Bill's overall message of professionalism, image, proper pricing, and overall integrity was more important to the industry than any hurt feelings he caused.
I am grateful that, after he retired, he and I started a very warm and pleasant email coorespondence, and that helped heal my lingering bad feelings at the shots he took at my father.
Overall, what he and his company gave to our industry was just what many needed during the time they had a strong place in our business.