I've used Balsamiq to sell business groups inside of very large corporations to sign off on project estimates. It's a fast, easy way to show them what they're g

I've used Balsamiq to sell business groups inside of very large corporations to sign off on project estimates. It's a fast, easy way to show them what they're getting for their money, and becomes v0.1 of the design as well, with enough fidelity to discover usability & flow without locking into many other design choices.