My longer review:
I am very happy with my yoga brick. The price was right at under 9 dollars...and I have to admit I liked the deep purple color, as it matches my most-used yoga mat and my strap. Truthfully, having matching yoga props isn't highly important, but it still brings me happiness to associate that certain deep purple color with my yoga practice. And with that extra little pleasure I enjoy and DO my practice more often. Doing yoga is what counts.
My brick arrived in a clear plastic sleeve that I removed prior to using.
I picked a yoga DVD that I hoped would use a brick. Not only was I pleased to use this lightweight, silky foam brick as a "brick" - but I also used the brick in place of a bolster and pillow as needed. It's soft enough around the edges to be useful in place of those other props.
The brick has several dimensions, from a short height, mid height and tall height. It can be used in two directions as well - the short or long dimensions. I appreciate that there are so many ways to use one tool.
Being so light in weight, the brick is a bit wobbly in the high position poses (on it's tallest axis), but I found I can get past this by loosening my hips (like Elvis) and going with the wobble. I prefer the lightness of this than a wooden brick that would be harder on my body parts and heavier to maneuver.
Overall, I recommend this yoga prop for anyone thinking of buying a brick/block to deepen their practice. It's multi-use, has soft edges that do not dig into the body, and has a silky hand feel.