This dictionary is nicely suited for its purpose, i.e., a relatively compact presentation of core terms and concepts. Although this edition is approximately 150 pages longer than the previous edition, its still relatively compact when compared to full size mathematics dictionaries. While not as comprehensive as larger volumes (e.g., the excellent but older Mathematics Dictionary by James and James), this dictionary often provides more concise definitions then its cohorts.
Its smaller size means its often quicker to find the terms you want here than in a larger dictionary, and its also a plus if you travel frequently, as it more easily fits into a carry bag or computer case. Its primary weakness is its lack of more comprehensive coverage, occasionally, lacking definitions of even some basic terms.
Having more than one mathematics dictionary can provide different perspectives. Thus, although this cannot be recommended as the 'one' mathematics dictionary to own, it can be recommended for use with other dictionaries as a good alternate source for concise definitions.