They were ok in my book.
I had some warranty repair done on my AudioRefinement Pre Pro recently. Audio Plus Services is the US distributor for YBA, among other brands. They are located in NewYork, as well as Canada. In order for my unit to be repaired in Canada, I needed to supply my SS in order to ship across the border. At least according to them. They are very reputable, and I didn't have a problem giving them my SS.
Audioplusdirect is a division of Audio Plus Services. They were straight shooters when I dealt with their service dept. In fact, my unit was past warranty and they still checked it out free of charge for me.