Its is user friendly, you can see video and learn. I learned axure on my own & I'm using this for all my prototyping requirements. Easier way to share link with clients for there review.

Axure is not the only tool for mock-up creation but it is very complete, because it allows to generate both HTML and Specifications. It is possible to collaborate on a mock-up and to easily share the result with customers and partners.

Low learning curve and ease of use. Tool is flexible enough to carry over a near-complete vision. Adaptive views were quite helpful.