We are using IceBooking for small business (renting few houses), and i can say this is simply perfect component for that. Component is simple, easy to setup and use, robust and stable. But this is not the reason why i wanted to write this review. The reason is that i have never seen such customer support. These guys are ready to help with any possible situation you might have (of course, about their component).
Highly recommend to everyone to buy this component, it`s worth of every cent.