It's more of a pain in the ass but I can write my own tests with Selenium in Cucumber or RSPEC or what have you, and I can use all kinds of wrappers for it(Watir, TelluriumDriver, etc). I understand the ease of just doing a "trace" graphical test instead of writing the code, but why would I pay you 90$/month for the privilege? Not only that, I can get much more granular with my RSPEC-Selenium tests. Oh yes, I can also re-use methods that encapsulate sequences of decisions like sign_up_for_website instead of having to resign up every time I make a new trace.

I can go through a sign up flow and then grab the last user with Ruby and do actual checks on it's methods and members, and then go back to browser navigation. This seems like a less free way to do fewer checks with a prettier interface.