pros (y/o) contras

= merits (and/or) demerits, strengths (and/or) weaknesses, pluses (and/or) minuses

Ex. The author examines the merits and demerits of a variety of techniques designed to determine user preferences for information services.

Ex. The Library of Congress (LC) is attempting to identify costs, benefits, strengths and weaknesses associated with the introduction of optical disc technology for storage and use of LC collections.

Ex. Whether these differences are pluses or minuses depends very much on a library's needs and expectations.

* * *

= merits (and/or) demerits, strengths (and/or) weaknesses, pluses (and/or) minuses

Ex: The author examines the merits and demerits of a variety of techniques designed to determine user preferences for information services.

Ex: The Library of Congress (LC) is attempting to identify costs, benefits, strengths and weaknesses associated with the introduction of optical disc technology for storage and use of LC collections.

Ex: Whether these differences are pluses or minuses depends very much on a library's needs and expectations.