thanks for the reply. With all due respect, I am one of many who does his own home maintenance and repair, but have never sweated a water line. I am leery about learning on the job, because an unpredictable failure means no water in the house. It appears that SB fittings are approved as code in other countries, even for behind walls. I am trying to find out if the simplicity of the product offends those who are comfortable sweating a water line, or if there is documented product failure of SB that isn't due to user error. I don't think the expected life of copper sweating is forever, although it might seem to be. Is there proof that SB fittings are temporary, which is in conflict with manufacturer's statement, or is it emotional bias against a new product? I have no skin in this game, except a fear of creating a disaster that forces my hand to get a plumber's help if I fail at soldering, or damage adjacent area by heat. Practice before trying won't prove the joint is solid unless it is under pressure. That's why there is a market for such a product. But I also don't want a flood because of SB failure either.
Any objective insight is appreciated.