I have used Manando and it was OK-ish. It's CEC ( Cation Exchange Capacity ) substrate, so it'll absorb certain mineral ions from the water and hold them for plant uptake...kinda of a nutrient reserve. I found it very difficult to slope, other have had success sloping it, after spraying it with a water spay for a few hours! It's hard to plant in as it's really light, it also blows around as it's so light. In short, i won't use it again. You can only get it in one colour as well.
Pro's it does have a high CEC.
I have also swapped to Florabase by Colombo, and am very happy with it.