The Yoga Monster Yoga Mat provides a very basic, affordable surface on which to practice. The Monster Mat will provide you some comfort, stability, and traction. However, more serious practitioners will quickly desire a more serious mat like the Jade Harmony. Those that have a more restorative yoga practice will benefit from a pad such as the ProSource Premium 1/2-Inch. Travelers or urban yogis in need of a portable solution might prefer the Manduka PROlite.
In summary this mat works, but there's really nothing special about it. It lacks a quality feel on the hands, doesn't provide that extra support or stability that one might desire, and in general has an inexpensive feel to it. For an infrequent practitioner we recommend reaching out to the yoga community (check with your local studio) and borrowing or purchasing a used mat instead of investing in one you may want to replace sooner rather than later.