B-Ionic hands down is the best 2 part there is IMO. I noticed a difference in the water quality and a little goes a long way. I have been using this for almost a year and I had no regrets. They boast trace elements as well while adding calc and alk so thats always a plus. I like the science behind there research and over all a great company (ESV)
I like the BRS. The proportioned are nice. I make up a gallon of each for under $7 and it lasts me two months. I know I could measure and get it for MUCH less.