Wow! Good to see the thread still going.
At this point I only use BW Barley since I still have some left over. Since I only keep PFR now there is no point in fancy products. If I did get back into shrimp seriously I would still pick up a few BW items since they worked so well; especially Shield.
In terms of the above question about the GH UP....I used it for a short time due to the ambiguous instructions and mixing powders. I prefer Shirakura Ca+ which is just a liquid and much easier to manage. It's pretty cheap too if you have one or two shrimp tanks.