You can tweak and customize the testing for whichever type of situation best fits your current Web site and server setup. While not perfect, WebStress does provide you an idea as to how your site, in its current state, will hold up under pressure. A cool interactive script on your site is great, but not if ends up melting your Web server in the process. With WebStress you can start out with your site at its most basic and then test it to get a starting benchmark. In the end everyone wins.
Life is good.