I saw these on sale and needed some extra for crafting with friends or multiples of the same size stamps. I purchased two sizes. I like the grid for lining up the stamp both when applying to the block and for stamping onto paper. Very helpful. I also like the height of the block, which prevents me from getting ink on my fingers when loading the stamp. Also, on sale they were a great price.
These stamp blocks are THICKER ! I like these so much better that the thin ones. You seem to have more control. I would trade all my thin acrylic blocks with these in a second! The other feature is the grid marks. Helps to line up the stamp before you even stamp it o paper. Again, I love these THICK BLOCKS! I guess I really like ALL of the Umbrella Crafts Products
This is a very versatile stamp that can be used with most sets. It is very practical and fits in the hand nicely. I love the grid which helps me to stamp my image straight.