I've used the old and the new formula Grout 3000 recently.......
Why anyone would want to muck about with the best/user friendly grout around defies me.
When the warm(er) weather arrives, it will get to the stage where you will have to mix numerous different batches per bathroom,because it sets in the bucket so fast(not so user friendly).....2mm joints on ceramics on a hot summers day...... forget it!
Also why this fascination with grout manufacturers wanting to make standard wall/floor grouts that will do from 1mm joints up to 20mm joints??.......a one bag covers all???.......
''For that reason, I'm out''