I chose IceBooking because of recommendation from a friend and because of a quick and good answer of my questions to the developer.
It was very simple to set up and configure and it has a very nice and intuitive language interface which really helped to translate the component to my language.
Not only the pre-sale is good but the support is also fantastic!
One thing I noticed is that IceBooking is compatable with Joomla 3.0 in a beta version, although it is not mentioned on the exstension market. I use Joomla 3.0 and it is working perfectly!
I hihgly recommend this component!