POSITIVES:
Fully non-slip on the top (for the body) and on the bottom (how it 'sticks' to the floor).
Good weight (I believe such a mattress should be somewhat heavy).
Generous size, very good price.
NEGATIVES:
The intense smell of rubber that just won't go away!
After 5 months of use, with continuous airing in an outdoor space, the awful smell persists. It diminishes somewhat in the cold and starts again with the rise in temperature. Obviously, it is endemic to the product and will not go away. At this time with the high temperatures, it is impossible for me to use it because it makes me nauseous...
Really a shame because otherwise it is a wonderful product, but only for those with limited sense of smell!

It does not slip at all, 100% suitable for yoga. It is the only one with this material for its price (I bought it for 30 euros), comparable only to those of 80-90 euros. It is sturdy and heavy - be careful, the package does not include a case.

This mat is suitable for yoga and of course other styles of exercise. It does not slip at all and does not hurt the knees or elbows. The lines it has help you find your balance and "align" yourself. It is heavy, which is logical for its quality. The only negative is that it is very difficult to clean. I was wearing sunscreen and even though many hours had passed and it had been absorbed, it left a mark on the mat even though I washed the area on the spot. Generally, sweat marks stay for a long time and some even when you wash them.

Sturdy mattress, knees don't hurt at all... but unfortunately, in some yoga exercises, the feet slip on the surface. Also, due to its large weight, it is relatively tiring to move around.

Very good and high-quality mattress. Soft and firm. Only observation: it is quite heavy and makes it relatively uncomfortable for movements.