I purchased one block to give it a go and have since bought another to make a pair! They are great blocks to practice with and love the sustainability aspect!
We bought two different mats - the smaller one for my wife and the larger one for me. The larger mat is awesome! The smaller mat is deficient in that it does not have the rubbery backing which makes the larger mat softer on our hardwood floors.
These are strong and sturdy yoga blocks. They don't slip beneath you (if you are putting your weight on them) and I am not worried about slipping off of them either. Highly recommend. Wish I bought them sooner!
Perfect weight, great stability and amazing grip.
And it smells good too!!