I recently restarted with safe-t-sorb, my findings:
- plants are very happy
- very easy to rinse!
- super cheap
- looks very natural, but also has an interesting and varied texture
My only complaint is that it seems quite light compared to other substrates, so it's easy to kick up dust when planting, etc. But, no problem! I am really happy with it and it was like 10 bucks for my 54g