Pros : Very easy to use, cut to size. Large size gives you several projects use. With plastic coated pattern under the mesh its very easy to align mosaic pieces without getting a wiggly pattern.
Cons : Be sure to cut the mesh along a straight line on all sides if that is what your design requires.
Other Thoughts : This mess allows one to obtain a straight line for tile placement. Place pattern (drawn in heavy marker) under plastic wrap, then place mesh on top. Tape all to piece of cardboard. Use small amounts of glue on tiles during assembly. Once all tiles have been placed cover project with a second cardboard, flip over and carefully lift mesh and tiles off the plastic wrap, let inverted mosaic dry upside down until ready to grout.