Requiring a signup before I can find out anything about the service is pretty upsetting. Luckily, the signup process doesn't require email validation to start using the service...so I hope the enjoy the garbage user data I entered to try it out.
I may be wrong, but it could be easier if I didn't have to click 3 times to signup or even better, if I could try without having to signup.<p>Anyway, the ui is great, probably an usefull tool combined with cross platform application