One thing to be careful of is contamination. If you're putting this in a pH sensitive environment, try it in a bowl of water first. Let the water sit for a day or so to degas and come to equilibrium with your house, then measure the pH, add some washed substrate, and wait. Measure the pH daily for a while.
It's a pain in the butt to do, but if you've got pH sensitive species, it can save you a lot of trouble. I lost a ton of baby shrimp to it a few years ago when mine was contaminated with some carbonate mineral (limestone or similar.) I really like the look of it, and plants seem to do well in it, but I wouldn't use it with anything that wants low pH. I do still use it in an RCS tank.