After reading tons of threads on RC and and staying in contact with Sam(who is also using CS), I thought that it's time to update you all on my trial of using this mix.
I was using IO in my 27gl for over five years, then switched to MEI's Crystal Sea a few months ago. After performing two 5gl water changes(1 per month), I am happy to report no ill effects
So I guess I will stick with it for now
I also wanted to mention my three bits:
One- that I have noticed no residue in the pail after mixing CR- I always got residue when mixing IO
Two- on a negitive note I don't like the fact that I have to use a hammer and chissel to break up my new saltmix
Three- I fragged about 30 pieces of Digitata and Gorgonian on the weekend and was happy to see that nearly all the frags have fully extended there polyps after only two days

When I fragged about three months ago, it took over a week for the same corals to open up.
IMO-I think there has to be some serious long-term test before we can draw conclussions on which mix is "best". People have asked why I decided to change after using IO for so long-Well the only answer I can provide is that I want to use the most natural ASW as possible.
Sam experienced some effects, which I'm sure he will provide details in a reply on this post.
Time will tell
cheers, Rich