I personally don't like the color (too red) or texture of Flourite. I don't like the fact that I have to rinse it out well before using, either.
Eco-complete still remains my substrate of choice because of the softer/rounder granules and pleasant black color.
Florabase is o.k.
Yes, I did tear that nano cube down. It also shattered into a gazillion pieces when it was shipped via UPS ground (seriously, the thing was completely and utterly shattered into tiny glass shards...I don't know what the heck they were doing with it while it was en route). At least I got partially refunded for the damages...
Carlos