This is probably the best version of online booking I've seen or had to use. The problems with most of these sites is the fact that they require you to send customers to a third party. If tungle.me could run embedded in the clients site, and integrate in any meaningful way with existing client databases it would be a home run. As it is my own clients will continue to request the very basic booking system that I have built simply because the customer never has to leave their site and it will take advantage of their existing customer database and billing systems.