Quite often the business users involved in deciding software tools for their firm, emphasize heavily on features and look-n-feel aspects of the tools. They keep comparing tools in a table that has columns with the list of features.
What gets missed out in this evaluation process is the non-feature aspects of a proposal tool. And let me tell you, these aspects are very important. For example, you may zero on a proposal software that ticks almost all items in your features list but what if, it does not offer enough support or the rest of your team does not find it intuitive to use.