Has anybody got Journeys to work?

Has anybody got Journeys to work?

I have set up a very simple Journey, it literally just sends an email to a lead if he or she hits a certain page on my website and fills in a smart pop up form. 
It doesnt work! 
I have tried other variations, equally simple but still I couldnt get it to work, 

Has anybody actually used Journeys and if so what are you using it for?

Regards,
Elisabeth