I LOVE the B-Ionic salt. It mixes almost instantly (can be used 20min after mixing) as opposed to to having to wait 12+ hours after mixing to put in the tank. It is slightly more expensive, but you get the exact same parameters every time.
I switched a couple years ago during one of my previous tanks and will never go back to anything else. If you can splurge the extra few bucks, your tank will love you for it.
Yeah, I've switched to B-Ionic 2 part for similar reasons, from the BRS 2 part. Just much easier to deal with, more concentrated, though a bit more expensive as well. B-Ionic make solid products.