Anders Ramsay has a great post on why he doesn’t use prototyping tools. His biggest problem with prototyping tools are:

  • They’re based on the old, when design should focus on the new.
  • They’re technology specific
  • They create an illusion of a valid design

I don’t necessarily agree with his second and third points, or feel they’re not as important, but definitely agree with his first point.

At the same time, I think it’s important to keep in mind that most of these prototyping tools aren’t target at people like Anders and me — people who are quite comfortable coding HTML. These tools are typically intended for visual designers (e.g. Fireworks) or product managers (e.g. Visio, Axure). Not to say they don’t have value to others, but I do think they’re beneficial to the audience they’re targeted at.

Either way, if you use one of these tools, I’d recommend starting off on paper first so you’re not “bound” by what the software can(not) do.